Why is my semen green? Most often, green or greenish semen is a sign of infection in the male reproductive or urinary tract — commonly prostatitis or a sexually transmitted infection such as gonorrhea — rather than something harmless. It is usually treatable, but if you also have pain, burning, foul smell or fever, please see a doctor promptly (Cleveland Clinic, 2024).
Let me answer this the way I do almost every week in my clinic, when a worried man sits across from me and quietly says, “Doctor, my semen looked green — is something seriously wrong with me?” (Some men describe it as “green sperm,” though it is really the seminal fluid, not the sperm cells, that has changed colour.) First, take a breath. Noticing a colour change like this is alarming, and it is sensible that it brought you here. But I am not going to do what some articles do and simply tell you to “relax and ignore it.” That would be poor medicine. Green semen is one of the few colour changes that genuinely deserves attention, because the most likely explanation is an infection — and infections are easy to treat once we find them, but not safe to ignore. So let me walk you through exactly what greenish ejaculate means, what is probably causing it, and the clear signs that mean you should come in.
Quick facts
- Normal semen is a whitish-grey, jelly-like fluid; its colour can shift slightly with diet, age and how long it has been since you last ejaculated (Cleveland Clinic, 2024).
- A yellow-green or bright green tint most often points to infection — prostatitis or a sexually transmitted infection — frequently alongside burning when you pass urine (Medical News Today, 2024; Healthline, 2026).
- STIs most associated with a green or yellow-green tint are gonorrhea and chlamydia (Medical News Today, 2024; Healthline, 2026).
- Excess white blood cells in semen — pyospermia (leukocytospermia) — can accompany infection and can harm sperm; the WHO threshold is more than 1 million peroxidase-positive leukocytes per millilitre (WHO, 2021).
- Green or foul-smelling semen with fever, pelvic pain, or pain/burning on urinating or ejaculating warrants prompt evaluation — not reassurance to ignore it (Cleveland Clinic, 2024).
Here is something I want to correct straight away, because the older version of this very article said it. It is sometimes claimed that a “liver problem” or bilirubin turns semen green. In practice, jaundice and liver-related pigments are associated with a yellow tint, not a true green. When semen looks genuinely green, the explanation that matters clinically is infection. Let me explain the real causes.
What causes green or greenish semen?
1. Infection of the prostate or seminal tract (the most common reason)
The prostate and seminal vesicles produce most of the fluid in your ejaculate. When they become infected or inflamed — prostatitis or seminal vesiculitis — pus and white blood cells mix into the semen and can give it a yellow-green, sometimes foul-smelling appearance (Medical News Today, 2024; Healthline, 2026). In my clinic this is the single commonest reason a man notices a green tinge, and it usually comes with a clue: a burning sensation while passing urine, a heavy ache in the pelvis or perineum, or discomfort on ejaculation (Cleveland Clinic, 2024).
2. Sexually transmitted infections (STIs)
Green or yellow-green semen, especially after unprotected sex, can be a sign of an STI. Gonorrhea is the classic culprit and can produce a thick, greenish urethral discharge that colours the ejaculate; chlamydia is also linked to a yellow-green tint (Medical News Today, 2024; Healthline, 2026). Many STIs are silent in men, so colour change may be your only warning. If there is any chance of exposure, testing for gonorrhea and chlamydia is the responsible next step — a single NAAT swab or urine test screens for both (CDC, 2021).
Other genital-tract infections — including genital herpes (HSV-2) — can drive inflammation and raise the white-cell count in semen (pyospermia) without specifically turning it green; the green tint itself points more to gonorrhea, chlamydia or prostatitis (Cleveland Clinic, 2023).
3. Pyospermia / leukocytospermia (too many white blood cells)
When your body fights infection in the reproductive tract, it floods the area with white blood cells. An abnormally high count of these in semen is called pyospermia, or leukocytospermia. The WHO defines it as more than 1 million peroxidase-positive leukocytes per millilitre of semen (WHO, 2021). These cells release reactive oxygen species — useful against germs, but they can also damage your sperm and their DNA, which is why pyospermia matters if you are trying to conceive (Cleveland Clinic, 2023). A semen analysis will pick this up.
4. Medications, supplements and certain foods
Not every colour change is sinister. Certain foods, spices, vitamins and supplements — and the metabolites of some medications — can be reflected in seminal fluid and lend a yellowish tinge (Cleveland Clinic, 2024). In my experience these dietary causes tint toward yellow rather than a true green, and any such change is usually mild, comes without any pain or smell, and settles once you stop the supplement or food.
5. Rarely, dyes or contamination
Very occasionally a harmless dye, lubricant residue or external contamination explains an odd colour — a diagnosis of exclusion I reach only after infection has been ruled out (see the table below).
Green semen: cause vs. what you might notice
| Likely cause | Typical colour | Accompanying signs | What it usually means |
|---|---|---|---|
| Prostatitis / seminal tract infection | Yellow-green, may smell foul | Burning urine, pelvic/perineal ache, painful ejaculation | Needs urine + semen culture; antibiotics |
| STI (gonorrhea, chlamydia) | Yellow-green, sometimes with discharge | Discharge, burning, recent unprotected sex | Needs STI testing (gonorrhea + chlamydia NAAT) |
| Pyospermia / leukocytospermia | Yellowish to green | Often none; may affect fertility | Found on semen analysis; treat underlying cause |
| Foods / supplements / medication | Faint yellow-green | None; feels well otherwise | Usually harmless; settles on stopping |
| Dye / contamination (rare) | Variable | None | Harmless; diagnosis of exclusion |
In my practice, the men who turn out to have a genuine problem almost always have a second clue beyond the colour — a burning urine stream, a foul smell, an ache low in the pelvis, or a recent unprotected encounter they had not connected to it. The ones who are perfectly fine usually noticed only the colour, feel completely well, and often started a new supplement. So I tell every patient the same thing: do not panic, but do not self-certify either. A one-time green tinge with no other symptom can be watched and rechecked; green semen with pain, smell or fever, or after a risky exposure, needs to be seen and cultured. The cost of checking is a simple test. The cost of ignoring a treated-in-a-week infection can be your fertility.
Talk to an andrologist about green semen
When to see a doctor (red flags)
Please book an in-person evaluation promptly if your green or greenish semen comes with any of these:
- Fever or chills
- Pain or burning when you pass urine or ejaculate
- A foul or unusual smell to the semen
- Pelvic, perineal, lower-back or testicular pain
- Any urethral discharge, or recent unprotected sex with a new or untested partner
- Colour change that persists beyond one or two ejaculations, or keeps coming back
- Any blood in the semen along with the colour change
These are not signs to “wait and see.” They are the body telling you there is likely an active infection that responds well to the right treatment — and that benefits from being caught early.
How green semen is diagnosed
When you see me, the work-up is straightforward and not frightening:
- History and examination — I ask about pain, urinary symptoms, smell, sexual exposure and any new medication or supplement, then examine you (sometimes including a gentle prostate check).
- Urinalysis and urine culture — to look for urinary or prostatic infection and identify the organism (Cleveland Clinic, 2023).
- Semen analysis with culture and sensitivity — to confirm pyospermia (white-cell count against the WHO threshold) and grow any bacteria so we choose the correct antibiotic (Cleveland Clinic, 2023; WHO, 2021).
- STI testing — gonorrhea and chlamydia by NAAT, with broader screening (including HIV and syphilis) if exposure is likely, because these infections often travel together (CDC, 2021).
How green semen is treated
Treatment targets the cause, which is why testing comes first.
- Bacterial prostatitis or seminal infection is treated with a targeted course of antibiotics, guided by the culture and sensitivity result — not guesswork or leftover tablets.
- STIs are treated according to current guidelines (for gonorrhea and chlamydia), and your partner should be tested and treated too to prevent reinfection (CDC, 2021).
- Pyospermia is managed by treating the underlying infection; where it is affecting fertility, addressing oxidative stress and rechecking the semen analysis after treatment is part of the plan (Cleveland Clinic, 2023).
- Supplement- or food-related colour simply needs the trigger stopped and a recheck.
After treatment, I always repeat the semen test. If the green colour and the white cells are gone, you can stop worrying. If they persist, we look further. That is the honest, complete answer — reassurance earned through testing, not assumed.
Private 1-on-1 consultation
Green semen and not sure what it means? Let’s check it properly.
A simple urine and semen test usually finds the cause in days — most are infections that clear with the right treatment. Don’t self-certify, and don’t panic; get it cultured.
Book a Confidential Consultation
Frequently asked questions
Is green semen always an STI?
No — but an STI is one of the important possibilities, so it should never be dismissed. Green or yellow-green semen can come from prostatitis, an STI such as gonorrhea or chlamydia, pyospermia, or sometimes harmless causes like supplements. If you have had unprotected sex, testing for gonorrhea and chlamydia is the responsible step (Healthline, 2023; CDC, 2021).
Will green semen affect my fertility?
It can, if the cause is an infection or pyospermia. Excess white blood cells release reactive oxygen species that can damage sperm and their DNA, which may lower fertility (Cleveland Clinic, 2023). The good news is that treating the infection often improves the picture, and we confirm that by repeating the semen analysis.
Does green semen go away on its own?
If it is purely from a food or supplement, it usually clears once you stop the trigger. But if an infection is behind it, it will not reliably resolve on its own and can quietly worsen or affect fertility — which is why green semen with any pain, smell, fever or risk of exposure should be evaluated rather than waited out (Cleveland Clinic, 2024).
My semen is green but I feel completely fine — should I still worry?
A one-off green tinge with no pain, no smell, no urinary symptoms and no recent risky exposure is often benign and can be rechecked at your next ejaculation. That said, because some STIs are silent in men, a simple semen analysis and, if relevant, STI test give you certainty rather than guesswork.
What is the difference between green and yellow semen?
Yellow semen is frequently harmless — from age, abstinence, a little urine, or foods and vitamins. A true green, especially yellow-green or bright green, tilts more strongly toward infection and pus, and so deserves a lower threshold for testing (Cleveland Clinic, 2024; Medical News Today, 2024).
Book a confidential consultation
Talk to Dr Shah about testing for infection or STI, a semen analysis, and clear next steps — discreet and judgment-free.
Free guide · no spam · unsubscribe anytime.
Related reading
- How much pus cells in semen is normal? Should you treat pus cells in semen? — the companion guide to pyospermia.
- Semen analysis calculator — interpret your white-cell and other semen parameters.
- Jelly-like semen — should you worry? — another common “is this normal?” question.
- Gonorrhea: symptoms and treatment and Chlamydia symptoms and treatment in men — the two STIs most relevant here.
- STD clinic — full sexual-health screening — if you need testing after an exposure.
- Why is there blood in my sperm? Hematospermia explained — a related colour-change symptom.
References
- Cleveland Clinic. Yellow Semen: Causes, Treatment & Other Ejaculate Colors. Last reviewed 2024. https://my.clevelandclinic.org/health/symptoms/21600-yellow-semen
- Cleveland Clinic. Pyospermia: Causes, Symptoms, Diagnosis & Treatment. Last reviewed 2023. https://my.clevelandclinic.org/health/diseases/15220-pyospermia
- Healthline. Semen Color Chart: Gray, Green, Brown, Texture Changes, and More. 2026. https://www.healthline.com/health/mens-health/semen-color-chart
- Medical News Today. Why does semen color change and what does it mean? 2024. https://www.medicalnewstoday.com/articles/semen-color
- World Health Organization. WHO Laboratory Manual for the Examination and Processing of Human Semen, 6th edition. 2021. (Leukocytospermia: >1 million peroxidase-positive leukocytes/mL.)
- Centers for Disease Control and Prevention. Sexually Transmitted Infections Treatment Guidelines, 2021 — gonorrhea and chlamydia. https://www.cdc.gov/std/treatment-guidelines/
A private, judgment-free space to talk through fertility and men’s sexual health. Walk in, or book ahead by phone.
📍No 21, Sree Kalki Apartments, Ground Floor, Bazullah Road, T-Nagar, Chennai 600017
Thanks very much for this information you have given to me am very grateful it will help me I will go street to the hospital and due as you people have tell me to due and I will share your video thank very much love you I which I will have my own babes
Glad you like the content. Please share!