The commonest STD symptoms in men are penile discharge, burning urine, sores or blisters, warts, itching and testicle pain. They usually appear days to weeks after sex, yet many infections cause none, so only a test can confirm.
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Hello! Vanakkam and Namaste. This is Dr Shah Dupesh, consultant sexologist in Chennai.
A man usually reaches this page late at night. There is a spot, a sting or a drop of discharge, and a memory of one encounter he now regrets. So he searches, finds a hundred frightening pictures, and convinces himself of the worst.
I see these men every day. Some have an infection that is easy to cure, but many have nothing to do with an STD at all. So, in this guide, I start from what you can actually see or feel, and tell you what it usually means, when it shows up, and what to do next.
Read this first
STD symptoms in men: the whole answer in six points
Seven warning signs
Discharge, burning urine, a sore, blisters, warts, itching or redness, and a painful testicle. Any one of them means test, not guess.
Silence is common
Most chlamydia is silent, in men too. Across men and women, over 80% of cases cause no symptoms (Hocking, 2023).
Timing gives clues
Gonorrhoea shows in 2 to 7 days (Besa Castellà, 2023). Chlamydia usually takes 1 to 3 weeks. Syphilis and warts can take months.
Many scares are harmless
Pearly penile papules are the commonest thing I see. They are normal skin, seen in about 4 in 10 young men (Agha, 2009).
Pictures cannot diagnose you
Even doctors cannot name the germ from symptoms alone (Werner, 2025). A swab and a NAAT, a DNA test that finds the germ itself, can.
Do not take chemist antibiotics
Wrong pills hide the infection and breed resistant gonorrhoea, which is rising in India (Sharma, 2025).
Jump to: 7 warning signs · symptom by symptom · when they appear · after 1 week · silent STDs · not an STD · what to do
The 7 warning signs of an STD in men
These are the signs that bring men to my clinic. Each one also has a short explanation further down, with the infections that usually cause it.
- Discharge from the penis. White, yellow, green, cloudy or clear fluid that is not urine or semen, often worse first thing in the morning.
- Burning or pain when you pass urine. The commonest symptom of all, sometimes with cloudy urine or passing urine more often. It was present in 88% of men with urethritis, an infection of the urine tube, in one study (Bellinato, 2021).
- A sore or ulcer. On the penis, scrotum, anus or mouth. It may be painful or, as in syphilis, completely painless.
- Small blisters. Tingling, then clusters of fluid-filled bubbles that burst into shallow, painful sores.
- Warts or bumps. Soft, skin-coloured growths, single or in a cauliflower-like group.
- Itching, redness or swelling. At the tip of the penis, under the foreskin or in the groin.
- Pain or swelling in a testicle. A heavy, aching testicle that builds over a day or two. But if the pain comes on suddenly and severely, within minutes, that is not an STD sign: it can be a twisted testicle, which needs a surgeon within hours. A painless lump is a different problem again, covered in lumps on the testicle.
Less common signs, and the eighth sign
Less common signs include swollen glands in the groin, pain when you ejaculate, or a little blood in the semen. And there is an eighth sign, the most important one: nothing at all. Many infections give no warning, which is why I explain silent STDs below.
So if you have one of these signs, do not wait for it to go away. Some do settle on their own, but the infection underneath often stays and keeps spreading.
Start from what you see: STD symptoms in men, one by one
Every other article lists STDs one disease at a time. But you do not walk in with a disease; you walk in with a symptom. So here is the same information turned around.
A few names will come up often. Trichomonas is a tiny parasite; Mycoplasma genitalium and Gardnerella are bacteria. All three pass during sex.
| What you notice | Usual STD causes | Non-STD causes | Read more |
|---|---|---|---|
| Thick yellow or green discharge | Gonorrhoea; sometimes Mycoplasma genitalium | Rarely anything else | Gonorrhoea |
| Thin, clear or white discharge | Chlamydia, Mycoplasma genitalium, Trichomonas | Pre-ejaculate during arousal, smegma under the foreskin | Chlamydia |
| Burning when passing urine | Gonorrhoea, chlamydia, Mycoplasma, Trichomonas | Friction after sex, dehydration, a urine infection | Burning |
| One painless, firm sore | Primary syphilis | None I would trust. I test every sore. | Syphilis |
| Painful blisters or shallow sores | Genital herpes | Rarely anything else; get it swabbed while fresh | Herpes |
| Soft, skin-coloured bumps | Genital warts (HPV); molluscum (small, shiny, dimpled bumps) | Pearly penile papules, Fordyce spots | Lookalikes |
| Itching and redness at the tip | Trichomonas, early herpes | Fungal balanitis (thrush), soap irritation | Balanitis |
| Ache and swelling in a testicle over a day or two | Chlamydia or gonorrhoea spreading to the epididymis | A cyst or a strain | Testicle lumps |
| Red spots on palms and soles | Secondary syphilis | Some other skin rashes | Syphilis |
| Sore throat or fever after sex | Throat gonorrhoea; less often early HIV | A common cold or viral fever | Fever |
| Rectal pain, discharge, bleeding or itching | Rectal gonorrhoea or chlamydia, herpes, syphilis | Piles, a fissure | Rectal symptoms |
| Nothing at all | Chlamydia, gonorrhoea, Mycoplasma, Trichomonas, herpes, HIV, hepatitis B | — | Silent STDs |
How to read this table
One exception first: a sudden, severe pain in one testicle is not an STD, and it cannot wait. I explain why in the testicle section below.
Use this table to understand your symptom, not to diagnose it. As you will see, the overlap is huge, and that is the whole point.
Discharge from the penis
Discharge is the clearest sign of urethritis, an infection of the tube that carries urine and semen. It is also the sign men notice first. In one study, 86% of men with urethritis had a visible discharge (Bellinato, 2021).
The colour gives a clue, but only a clue. Thick yellow or green pus points towards gonorrhoea, while a thin, clear discharge is more typical of chlamydia. The chart below shows how much they overlap.
Men with confirmed urethritis, by infection. Gonorrhoea almost always gives thick pus; chlamydia more often gives a clear discharge.
95%
79%
78%
98%
70%
64%
Source: Bellinato, 2021 (101 NAAT-confirmed episodes of male urethritis, Italy).
Gonorrhoea and chlamydia also travel together. In some studies, the two occur together in up to 40% of cases (Besa Castellà, 2023), so one test result never rules out the other. And green semen, rather than discharge, has its own causes, which I cover in why semen turns green.
Burning when you pass urine
Burning is the single commonest STD symptom in men. Almost every man with gonorrhoea has it, but chlamydia, Mycoplasma genitalium and Trichomonas cause it too (Bellinato, 2021).
Timing matters here, too. Many men tell me the itch and burning began just 24 to 48 hours after the contact.
That can be very early gonorrhoea, which usually starts at 2 to 7 days and occasionally sooner (Besa Castellà, 2023). But burning within the first day is more often friction or soap irritation.
You cannot tell those two apart by how it feels, but a swab can. Also, a true urine infection is uncommon in young men, so I never assume it.
A sore, an ulcer or a red patch
Of all the symptoms, a sore on the penis frightens men the most. The two big causes are herpes and syphilis. In a small Brazilian study of 18 men with genital ulcers, herpes caused 7 and syphilis 6, and in 4 no germ was found at all (Barufaldi, 2026).
- Syphilis classically gives one firm, painless sore called a chancre. Because it does not hurt, men often ignore it, and it heals on its own while the infection spreads.
- Herpes gives tingling, then a cluster of small blisters that burst into shallow, painful sores.
But real life is messier than textbooks. Men often come to me with a red patch that they are sure is a harmless rash, and it turns out to be syphilis.
That is why I test every sore. Herpes sores also open the skin and draw in the very cells HIV infects, which may make HIV easier to catch (Rene Tanwieh, 2026).
Warts and bumps
Genital warts are caused by HPV. They are soft, painless, skin-coloured growths that usually appear 2 to 3 months after contact, though it can be anywhere from a few weeks to several months (CDC). They are not dangerous, but they spread easily and are treatable.
Most bumps I see, though, are not warts at all. Neat rows of tiny, even, pearly bumps on the rim of the head are pearly penile papules, which are normal skin; see the lookalikes section.
Itching and redness
Itching at the tip of the penis or under the foreskin is common after sex. Trichomonas and early herpes can both cause it.
Far more often, though, it is a fungal infection of the head of the penis, called balanitis, or irritation from soap and sweat. A persistent itch with a discharge needs a swab; a mild itch that settles in a day or two usually does not.
Pain or swelling in a testicle
When chlamydia or gonorrhoea climbs up from the urethra, it can infect the epididymis, the coiled tube behind the testicle, and this is called epididymitis. In sexually active men aged 14 to 35, these two germs are the commonest cause (McConaghy, 2016).
It starts as a gradual ache at the back of the testicle, often with burning urine. So get it seen early, because untreated epididymitis can cause infertility and chronic scrotal pain (McConaghy, 2016).
A sudden, severe pain is different. If one testicle suddenly hurts badly, especially with vomiting, or it sits higher than usual, it may be twisted.
A twisted testicle needs a surgeon within about six hours, or it can be lost. Do not wait for morning, and do not wait for a test: call me at once on 97907 83856, and if you cannot reach me, go to the nearest emergency department immediately, because a twisted testicle cannot wait.
Red spots on the palms and soles
Then, weeks after an untreated chancre, syphilis spreads through the blood. This is secondary syphilis.
It typically causes a non-itchy, reddish or copper-coloured rash, often on the palms and soles (CDC). But it can appear almost anywhere, and sometimes it spares the palms completely (Mohamed, 2023).
Not many rashes favour the palms and soles, so this is one sign I take very seriously. Men also come in with many spots over the body and assume herpes or syphilis. Some are right, but others have a harmless skin condition, and a blood test for syphilis settles it within a day.
Sore throat, fever or rectal symptoms after sex
A sore throat or fever, however, causes the most fear. A man feels unwell a few days after a risky contact, and then he is certain it is HIV.
Early HIV can cause a flu-like illness. At least half of people get it, usually 2 to 4 weeks after infection (Lama, 2025; CDC), and fever and rash are its strongest clues (Hecht, 2002). But the same symptoms come from an ordinary cold or viral fever, which is far more common.
A sore throat after oral sex can also be throat gonorrhoea; I cover throat risks in STDs from oral sex. So do not read your symptoms. If the contact was less than 72 hours ago, the question is PEP, not testing, so see me today.
If you have a fever with a rash or sore throat 2 to 4 weeks after a contact, do not wait: that is exactly when an HIV test can pick up early infection, so test now. Otherwise, I time the test as explained on my HIV window period page.
After anal sex, an infection in the rectum can cause itching, a mucus or pus discharge, bleeding, or pain when you pass stool. Most rectal infections, however, cause nothing at all, which is why I ask honestly what kind of sex you had.
What STD symptoms look like in my clinic
Textbooks describe the classic picture. But real patients rarely read the textbook, so here is what I actually see.
Dr Shahs notes (from my clinical observation): Here is what men actually bring to my clinic.
- Pearly penile papules are the commonest visit. Men are sure they have warts. They have normal skin.
- Red lesions are sometimes syphilis. A red patch that looks like a rash can be the infection itself, so I test it for syphilis.
- Itch and burning 24 to 48 hours after contact is a very common story. Only a swab tells early infection from irritation.
- Pus within a week usually means a real infection. Men who notice a pus-like discharge within a week of contact very often test positive for chlamydia or gonorrhoea.
- Red, circular spots on the palms and soles have turned out to be syphilis in most of the patients I have seen with them.
- A sore throat or fever after an exposure makes men assume HIV out of fear. Usually it is a common virus, but the answer comes from a test, not a guess.
So if your symptom is on this list, you are in good company. Every one of these men walked in frightened, and yet most walked out with a clear answer.
When do STD symptoms appear in men?
Every infection has an incubation period: the gap between catching it and noticing it. So the day your symptom started is a useful clue.
Usual time from sex to the first symptom. The dashed line marks one week.
Source: Besa Castellà, 2023 (gonorrhoea); CDC (herpes, chlamydia, syphilis, HIV, hepatitis B); BASHH (warts). An arrow means the range runs past day 100.
How to read the chart
Here, then, is what each bar tells you:
- Gonorrhoea is fast. Symptoms usually start 2 to 7 days after sex (Besa Castellà, 2023). A pus-like discharge within a week is its calling card.
- Herpes is fast but unpredictable. Textbooks say 2 to 12 days, about 4 on average (CDC). But in one older study, the gap in men ranged from 1 to 49 days, and some people had their first outbreak during a long, faithful relationship (Thin, 1991). So a first outbreak does not always point to your most recent partner; see herpes treatment.
- Chlamydia is slower and quieter. When it does cause symptoms, they usually take 1 to 3 weeks, sometimes up to 6 (Besa Castellà, 2023), as I explain on my chlamydia page.
- Syphilis takes about 3 weeks. The sore appears anywhere from 10 to 90 days after contact (CDC), and the palm-and-sole rash comes weeks later.
- Warts are the slowest. They usually take 2 to 3 months, sometimes up to 8. So the partner you blame may not be the right one.
One warning, though. These are usual ranges, not rules, and many men never get symptoms at all. So a symptom-free month proves nothing.
STD symptoms after 1 week: what is real, and what is too early
“It has been one week, doctor, and I feel something.” This is one of the commonest messages I get, so here is the honest answer.
What can show up within one week
- Gonorrhoea: discharge and burning, often in the first 2 to 7 days. So a week is enough time for it to show.
- Herpes: tingling, then blisters, often in the first 2 to 12 days.
- Chlamydia, Mycoplasma or Trichomonas: sometimes, though they usually take 1 to 3 weeks.
What usually does not show up yet
- Syphilis: the sore usually takes about 3 weeks.
- HIV: a flu-like illness, if it comes, usually starts at 2 to 4 weeks; I cover HIV symptoms and test timing after one week separately.
- Warts: usually months.
Is one week too early for an STD test?
If you have symptoms, no. Come in now to our STD clinic, because a swab of the discharge or sore can find the cause straight away. A NAAT on a swab or urine picks up gonorrhoea and chlamydia once there is enough germ to cause symptoms.
If you have no symptoms, however, one week is too early for most tests, and a negative result then can be false. Roughly: gonorrhoea and chlamydia from 2 weeks; syphilis from 4 to 6 weeks, repeated at 3 months; and hepatitis B from 6 weeks. And if the contact was less than 72 hours ago, the question is not testing at all; it is PEP, as I explain in what to do after a condom breaks.
STD symptoms in men by infection
Now the same picture, one infection at a time. Each one also has its own detailed page on this site, linked below.
| Infection | First symptoms in men | Often silent? | Curable? |
|---|---|---|---|
| Chlamydia | Clear discharge, mild burning, testicle ache | Yes, most cases | Yes |
| Gonorrhoea | Thick yellow-green pus, strong burning | In the throat and rectum, usually | Yes |
| Syphilis | One painless sore, later a palm-and-sole rash | The sore is often missed | Yes |
| Genital herpes | Tingling, painful blisters, flu-like first episode | Often unrecognised | No; controllable |
| Genital warts (HPV) | Soft, painless, skin-coloured bumps | Often | Warts are removable; a vaccine prevents them |
| Trichomonas | Itch, mild discharge, burning | Often, in men | Yes |
| Mycoplasma genitalium | Burning, discharge | Often | Yes; resistance is rising |
| HIV | Flu-like illness at 2–4 weeks, in at least half | Then silent for years | No; daily treatment controls it |
| Hepatitis B | Tiredness, nausea, sometimes yellow eyes | Often | Most adults clear it; if not, controllable; a vaccine prevents it |
The short notes below cover what matters most for each.
Chlamydia
Chlamydia is the quiet one. Across men and women, over 80% of cases cause no symptoms (Hocking, 2023). When it does cause symptoms, it is usually a thin discharge and mild burning.
Left alone, it can cause epididymitis. Read more on my chlamydia page.
Gonorrhoea
Gonorrhoea is the loud one in the penis and the silent one elsewhere. In the urethra it gives thick pus and strong burning within days. In the throat and rectum, infections like this are usually silent: in one European clinic, 89% of throat infections and 66% of rectal infections caused no symptoms (Kogler, 2025).
Treatment needs the right antibiotic, because resistance is rising (Sharma, 2025). See gonorrhoea treatment.
Syphilis
Syphilis passes through four stages: primary, secondary, latent and tertiary (Kent, 2008). First comes a sore that is painless and heals by itself, which is exactly why it is dangerous.
It is diagnosed with blood tests and cured with penicillin (Kent, 2008). See syphilis treatment.
Genital herpes
Herpes ranges from unrecognised or mild to severe, with recurring outbreaks (Van Wagoner, 2023). It can also spread when there are no sores at all, through silent shedding.
There is no cure, but tablets control outbreaks and cut the risk of passing it on (Van Wagoner, 2023). See herpes treatment.
Genital warts (HPV)
Warts are soft, painless bumps that can also appear months after contact. In a large Melbourne sexual health clinic, warts were the second commonest condition in men with symptoms, after urethritis (Soe, 2024).
The wart types of HPV do not cause cancer, and warts can be removed. A vaccine protects against both the wart types and the cancer types.
Trichomonas and Mycoplasma genitalium, plus a note on Gardnerella
These are the infections a basic test misses. Trichomonas in men is often silent, yet it can cause urethritis, prostate inflammation and reduced fertility (Van Gerwen, 2021).
Mycoplasma genitalium causes 10% to 35% of urethritis that is not chlamydia or gonorrhoea, and it can only be found with a NAAT test (Jensen, 2022).
Gardnerella, however, is different. It is the germ behind bacterial vaginosis in women, and it is not a classic STD in men; a man can carry it without symptoms or harm.
But it can pass back and forth between partners, so finding it tells me who needs treatment. That is why I include it in the panel I run for men with symptoms.
HIV
Early HIV can cause a flu-like illness in at least half of people (Lama, 2025). Then it goes silent for years.
Fortunately, today one daily tablet lets people live near-normal lives. See HIV treatment and, for test timing, the HIV window period.
Hepatitis B and C
Hepatitis B spreads easily through sex. Many men notice nothing; some get tiredness, nausea or yellow eyes weeks to months later.
Most adults clear it on their own, the few who do not are well controlled with tablets, and a vaccine prevents it completely. See hepatitis B.
Hepatitis C, by contrast, spreads through sex far less often, has no vaccine, and is now curable with tablets. See hepatitis C.
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Can you have an STD without symptoms? Yes, often
This is the part most men do not want to hear. The absence of symptoms tells you very little. Many men carry an infection for months without a single sign, and pass it on the whole time.
Share of infections with no symptoms, from three sources: a European clinic (mostly men), a Taiwan clinic (mostly gay and bisexual men) and a chlamydia review covering men and women.
88.7%
over 80%
76.5%
65.6%
31.3%
Source: Kogler, 2025 (Austria, 345 men and 95 women; throat, rectal); Hocking, 2023 (review, chlamydia); Hsieh, 2026 (Taiwan, 78% gay or bisexual men; throat or rectal vs penile).
Notice the pattern. Infections in the penis cause symptoms more often.
But even there, in a Taiwan study of mostly gay and bisexual men, almost a third were silent (Hsieh, 2026). Infections in the throat and rectum are silent most of the time (Kogler, 2025).
What STDs go unnoticed in men?
- Chlamydia: silent in most cases (Hocking, 2023).
- Throat and rectal infections: usually silent (Kogler, 2025). In a US study of gay and bisexual men, untreated rectal infections lasted 2 to 3 months on average, and some lasted almost a year (Barbee, 2022).
- Trichomonas and Mycoplasma genitalium: often silent in men (Van Gerwen, 2021; Jensen, 2022).
- Herpes: often unrecognised, and still contagious (Van Wagoner, 2023).
- HIV and hepatitis B: often silent for years after the first few weeks.
This is also true in India. At one Indian STI clinic, nearly 30% of rectal swabs tested positive for chlamydia, and all but one of those patients had a clean genital test (Arif, 2017). A genital test alone would have missed them.
So tell me honestly what kind of sex you had. For the throat, I swab only when there are throat symptoms; for the rectum, I decide with you based on the kind of sex you had.
The practical lesson is simple. Test after a new partner or a risky contact, even when you feel completely well. That includes a massage parlour visit, which men often wrongly assume was safe.
It might not be an STD at all: the common lookalikes
Now some good news. A large share of the men who come to me fearing an STD have something that is not an STD at all. Normal variants such as pearly papules and oil glands must always be told apart from infection (Hook, 2023).
Pearly penile papules: the commonest scare of all
Pearly penile papules are the single commonest reason men book with me, so I explain them first. They are one to three rows of tiny, smooth, dome-shaped bumps around the rim of the head of the penis. Men see them for the first time after a risky contact, look at wart pictures online, and panic.
They are simply normal skin, so they are not warts, not contagious and not caused by sex. In one UK clinic study, 48% of men had them, and over a third had worried about them (Sonnex, 1999).
Share of men who have them, by group.
48%
38.3%
42.4%
26.5%
11.4%
Source: Sonnex, 1999 (200 clinic attendees); Agha, 2009 (188 men under 25, 70 men over 50).
They are far less common in older men and in circumcised men (Agha, 2009). Also, they need no treatment. If they bother you cosmetically, they can be removed, but medically they can be left alone.
The other lookalikes
| Lookalike | What it looks like | How it differs from an STD |
|---|---|---|
| Pearly penile papules | Rows of tiny, smooth, pearly bumps around the rim of the head | Neat rows only on the rim; identical in size; unchanged for years |
| Fordyce spots | Tiny yellow-white dots on the shaft or scrotum | Normal oil glands; flat, many, unchanging |
| Smegma | White, cheesy material under the foreskin | Washes off; no burning or discharge from the tip |
| Fungal balanitis | Red, itchy, sometimes white patches on the head | Common with diabetes or poor drying; can pass between partners, so I check both |
| Friction irritation | Soreness or redness after long or rough sex | Starts within hours, settles in a day or two |
| Prostatitis | Pelvic ache, burning, frequent urination | Usually not an infection; needs a different plan |
Fordyce spots, in particular, are commonly misdiagnosed as an STD (Pietkiewicz, 2023). However, a doctor can usually tell these skin lookalikes apart from an infection in a minute of looking.
When it is NOT a lookalike: bumps that appeared after a new contact, that grow, spread, bleed or change shape, or that sit on the shaft, scrotum or anus rather than in neat rows on the rim, all need an examination. So does any sore or blister. Pearly papules have been there for years; you have only just noticed them.
So before you lose sleep, get it seen. Ten minutes in a clinic can end a month of fear.
Why you cannot diagnose an STD from symptoms or pictures
Men often send me photographs and ask me to tell them what it is. I understand why, but here is the truth: even experienced doctors cannot name the germ from symptoms alone.
A 2025 guideline on male urethritis says exactly this: the pathogens cannot be told apart with certainty from clinical features alone (Werner, 2025). The discharge chart above shows why, since the same burning comes from three different germs.
Online symptom checkers and pictures
A 2023 review searched for studies of people diagnosing themselves. It found them for only three conditions, vaginal infections, skin conditions and HIV, and concluded that the evidence does not support self-diagnosis for routine use (McLellan, 2023). Not one study tested men judging their own genital symptoms.
Symptom-checker tools are improving, but none yet fully matches a clinical assessment (Soe, 2024). Besides, a picture of a wart and a picture of a pearly papule can look identical on a phone, and harmless smegma under a foreskin gets mistaken for discharge all the time.
Why chemist antibiotics make things worse
In India, many men walk into a pharmacy and buy a course of tablets. Unfortunately, this is the worst thing you can do, for three reasons:
- The wrong drug hides the infection. Symptoms fade, the germ stays, and you keep passing it on.
- Gonorrhoea is now resistant to many tablets. In one Indian study, 13.4% of gonorrhoea samples resisted azithromycin, and some were multidrug-resistant (Sharma, 2025). Another, smaller Indian study found 5 of 50 samples resistant (Sethi, 2026).
- Treating by symptoms alone wastes drugs. In a Mumbai study of women with genital symptoms, treating without a test meant that, for chlamydia and gonorrhoea, over 96% of the drugs given were not needed (Tandon, 2026). The same logic applies to men. Even in a good French clinic, when partners with no symptoms were given antibiotics before their test came back, nearly 60% got at least one drug they did not need (Ben Said, 2025).
STDs in Indian men: the numbers
This is not a rare problem. In India’s National Family Health Survey, nearly one in ten sexually active men reported STD symptoms (R S R, 2026). And the estimated number of new STI cases in India rose by 83% between 1990 and 2019, partly because the population grew, with higher rates in men than in women (Kumari, 2025).
Most of those men never get a proper STD test. Many wait, many self-medicate, and many are simply too embarrassed to ask. As a result, the infections keep spreading, quietly, to their partners.
How I find the cause of your symptoms
My approach is simple: first I swab, then I test properly, and finally I treat what the test finds. No guessing, and no handful of random antibiotics. I always take the swab before any antibiotic, so the test is never spoiled, and the swab and NAAT results come back in 2 days.
| Your symptom | Sample | What it finds |
|---|---|---|
| Discharge or burning | Urethral swab and first-pass urine, NAAT | Gonorrhoea, chlamydia, Mycoplasma genitalium, Trichomonas (plus Gardnerella, for your partner’s sake) |
| A sore or ulcer | Examination, a swab of the sore, plus blood tests | Herpes (from the swab); syphilis (VDRL or RPR, confirmed by TPHA); HIV |
| Rash on palms and soles | Blood tests | Secondary syphilis |
| Sore throat after oral sex, or rectal symptoms | Swab of that site, NAAT | Gonorrhoea, chlamydia at those sites |
| Any risky contact | Blood tests at the right time | HIV, hepatitis B, syphilis |
For discharge or burning, I take a swab and run a NAAT, a DNA-based test that is far more sensitive than older methods. My panel covers gonorrhoea, chlamydia, Mycoplasma genitalium, Trichomonas and Gardnerella in one go. Mycoplasma in particular can only be found this way (Jensen, 2022).
For a sore, I swab it for herpes and check a screening blood test for syphilis, then a confirming one (Kent, 2008). A very early syphilis sore can still show a negative blood test, so if the sore looks like a chancre, I repeat it two weeks later. If you have throat symptoms after oral sex, or rectal pain or discharge after anal sex, I swab that site too.
Also, everything happens in one private visit at our confidential STD clinic in T Nagar. Nothing you tell me leaves the room, and nothing is reported to your family or employer.
What happens if an STD is not treated?
The bacterial STDs are easy to cure when caught early, and the others are well controlled. The harm comes from waiting.
- Fertility. Genital tract infections cause about 15% of male infertility, by the WHO’s estimate. Treating them can improve the semen report, though it has not been proven to raise pregnancy rates (Vives Suñé, 2026). If you are trying for a baby, a semen culture may be part of the work-up.
- Epididymitis. Untreated chlamydia or gonorrhoea can spread to the testicle, with infertility and chronic pain as the risk (McConaghy, 2016).
- Higher HIV risk. Herpes sores open the skin and draw in the very cells HIV infects, which may make HIV easier to catch (Rene Tanwieh, 2026). Any genital sore carries the same worry.
- Syphilis spreading. It can reach the eyes, ears and nerves even in the early stages, and years later it can damage the brain and heart (Kent, 2008).
- Your partner. Your partner can be infected without knowing it, because many infections are silent; in women, chlamydia can also damage fertility (Hocking, 2023).
None of this needs to happen, because the tests are quick, and the common bacterial STDs are curable with the right course.
What to do if you think you have an STD
If the contact was less than 72 hours ago, call me about PEP today. That comes before everything else. After that, here is exactly what I tell every man who calls me worried about a symptom.
Now the detail behind each step:
- Stop sex, including oral sex, until we have your result. If it is positive, wait until you and your partner have both finished treatment and a further seven days have passed.
- Do not take leftover or chemist antibiotics. They can hide the infection from the test and breed resistance.
- Note the dates. When was the contact? When did the symptom start? These two dates tell me which tests to run and when.
- Get a swab and a NAAT test, before any tablet. The results come back in 2 days.
- Get your partner tested and treated too. Otherwise the infection simply passes back to you.
If you still have burning or discharge a week after finishing treatment, come back; do not take another course on your own. For Mycoplasma and throat gonorrhoea I check the cure a few weeks later, for syphilis I repeat the blood test over the following months, and for everyone I retest at about three months, because reinfection from an untreated partner is common.
And if the fear stays even after clear results, it is treatable; our counselling service helps many men with exactly that.
Set the record straight
STD symptom myths, set straight
“No symptoms means no STD”
Most chlamydia is silent, in men too. Feeling fine proves nothing.
“It went away, so it’s gone”
A syphilis sore heals by itself while the infection spreads. Symptoms fading is not a cure.
“I can match it to a picture”
Warts and pearly papules look the same on a phone. Only an examination tells them apart.
“A sore throat means HIV”
Usually it is a common virus. HIV is ruled in or out by a test at the right time.
“The chemist gave me tablets”
Wrong tablets hide gonorrhoea and breed resistance. Test first, then treat.
“She looked clean”
Most infected people look and feel completely healthy. You cannot see an STD.
If one of these thoughts has kept you from getting checked, let it go. A clear answer is one private visit away at our confidential STD clinic.
STD symptoms in men: your questions answered
These are the questions men search for most. Short answers here; the detail is in the sections above.
What are the 7 warning signs of an STI?
Discharge from the penis, burning urine, a sore, blisters, warts or bumps, itching or redness, and a painful testicle. The eighth, and commonest, is no symptom at all.
What are the top 10 sexually transmitted diseases?
Chlamydia, gonorrhoea, syphilis, genital herpes, HPV (warts), Trichomonas, Mycoplasma genitalium, HIV, hepatitis B and pubic lice. The first five cause most of the symptoms men bring to my clinic.
What are the first signs of an STD in a man?
Usually burning when passing urine or a discharge from the penis. A sore, blisters or itching can also come first. Gonorrhoea often shows within a week.
How do STDs first start in men?
It starts silently. The germ settles in the urethra, throat, rectum or skin, and symptoms, if any, follow days to weeks later as burning, discharge or a sore.
How do you know if you have an STD?
Only a test can tell you. Symptoms overlap, and many infections cause none, so a swab, NAAT and blood tests are the only reliable answer. Swab and NAAT results take 2 days.
What do STDs look like on a male?
Thick or clear discharge at the tip, a single painless sore, clusters of blisters, soft warts, or a rash on the palms and soles, as in syphilis. Many look like nothing at all.
How do STD pimples look?
Herpes starts as small blisters that burst into shallow sores; syphilis is one firm, painless sore; warts are soft bumps. Many “pimples” are pearly papules.
How long does it take for STD symptoms to show?
Gonorrhoea 2 to 7 days, herpes 2 to 12, chlamydia 1 to 3 weeks, syphilis 10 to 90 days, and warts a few weeks to 8 months. Many infections never show at all.
Is 1 week too early for an STD test?
Not if you have symptoms: a swab can find the cause now. Without symptoms, wait about 2 weeks for gonorrhoea and chlamydia, and longer for syphilis and HIV.
Why does it burn when I pee after unprotected sex?
Gonorrhoea, chlamydia, Mycoplasma and Trichomonas all cause burning. So can friction or soap irritation. Only a swab tells them apart, so do not guess.
How long does burning after sex usually last?
Irritation from friction usually settles within a day or two. Burning that lasts longer, or comes with discharge, needs a swab and NAAT test.
What is the cause of white discharge in men?
A thin white or clear discharge is typical of chlamydia, Mycoplasma or Trichomonas. Pre-cum and smegma are harmless causes. A swab tells which.
What kind of male discharge is normal?
Clear pre-ejaculate during arousal and semen are normal. Any discharge at other times, especially yellow or green, needs testing at an STD clinic.
Is milky white discharge normal for men?
Not outside arousal or ejaculation. A milky discharge with burning suggests urethritis, often chlamydia or Mycoplasma.
How do I stop white discharge in males naturally?
Do not try home remedies. A discharge from the tip outside arousal is usually an infection and needs the exact antibiotic for the germ. Clear pre-cum during arousal is normal and needs nothing.
What are the symptoms of chlamydia?
In men: a thin clear or white discharge and mild burning, usually 1 to 3 weeks after sex, sometimes a sore testicle. But most chlamydia causes no symptoms. See chlamydia.
What STDs can you get from receiving oral as a man?
Gonorrhoea, chlamydia, syphilis, herpes and HPV can pass from a partner’s mouth to the penis. Burning or discharge days later means test. See STDs from oral sex.
What STDs go unnoticed in men?
Chlamydia, throat and rectal gonorrhoea, Trichomonas, Mycoplasma genitalium, herpes, HIV and hepatitis B can all be carried without symptoms.
How likely is it to have an STD without knowing?
If you have one, it is very likely you would not know. Most chlamydia and most throat infections cause no symptoms. That is why testing after a new partner matters.
Can throat inflammation be a symptom of an STI?
Yes. Gonorrhoea, chlamydia, syphilis and herpes can infect the throat after oral sex. If you have throat symptoms, a throat swab with NAAT finds the cause.
Is it normal for a guy to be itchy after sex?
Mild itching that settles within a day is usually friction or sweat. Itching that persists, or comes with redness or discharge, can be thrush, Trichomonas or herpes.
How long is itching after sex normal?
A day or two at most. Beyond that, or with any discharge, sores or burning, get examined.
How do I stop itching on my private part?
Find the cause first. Fungal balanitis needs an antifungal, an STD needs the right antibiotic. Keep the area dry and avoid strong soaps meanwhile.
Why is my penis painful after sex?
Usually friction or a small tear. Pain with burning, discharge, a sore or a swollen testicle suggests infection and needs a test. Sudden, severe testicle pain is an emergency.
Is balanitis painless?
Not usually. Balanitis causes redness, itching and soreness of the head of the penis. A painless sore is more typical of syphilis.
How soon after sex do UTI symptoms start?
Usually within a day or two. But true urine infections are uncommon in young men, so burning after sex is more often an STD, irritation or prostatitis.
How long does an STD last in a male?
Untreated, most last months to years; in one study, rectal gonorrhoea and chlamydia lasted 2 to 3 months on average (Barbee, 2022). With the right treatment, most bacterial STDs clear in days.
What is the fastest way to treat an STI?
Get the swab done before any tablet, then take the exact antibiotic for the germ found. That is faster than random tablets that fail and need repeating.
What should I do if I think I have an STD?
Stop sex, avoid chemist antibiotics, note the dates, and get a swab and NAAT test. Within 72 hours of the contact, ask about PEP. Call or WhatsApp 97907 83856.
What happens if you get an STD and leave it?
It can spread to the testicles, affect fertility, raise HIV risk and infect your partner. Untreated syphilis can affect the eyes and nerves early, and the brain and heart later.
Can STDs be cured, and are all STIs curable?
Chlamydia, gonorrhoea, syphilis, Trichomonas, Mycoplasma and hepatitis C are curable. Herpes and HIV are controlled with treatment, and most adults clear hepatitis B. Warts can also be removed.
Am I overthinking that I have an STD?
Possibly. Many men I see have pearly papules or friction soreness, not an infection. One proper test settles it. If worry continues after clear results, counselling helps.
Can a man live a normal life with an STD?
Yes. Most are cured, and herpes and HIV are controlled with tablets. An STD is a medical problem, not the end of your life.
How to prevent gonorrhea?
Use a condom for every act, including oral sex, limit partners, and test after any new partner. Treat partners together so it does not pass back.
The bottom line
The commonest STD symptoms in men are discharge, burning, sores, blisters, warts, itching and testicle pain. But the commonest of all is no symptom, and many frightening bumps are perfectly normal skin.
So do not read your symptoms, and do not treat them from a chemist. Instead, note the dates, get a swab and a NAAT test, and treat your partner too.
I hope this helped. This is Dr Shah, consultant andrologist in Chennai.
If you have noticed something, message me. Nothing you say leaves the room.
Private consultation
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References
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No 21, Sree Kalki Apartments, Ground Floor, Bazullah Road, T-Nagar, Chennai 600017