STD Symptoms in Men: Discharge, Burning, Sores and the Signs That Are Easy to Miss
Written by Naurah Gaspard, DNP, FNP-C, FNP-BC · Medically reviewed by Cherlie Joseph, MSN, FNP-BC · Updated November 2026
The most common STD symptoms in men are burning when you pee, discharge from the tip of the penis, and new sores, blisters or bumps on the genitals. Many men with chlamydia, gonorrhea or trichomoniasis have no symptoms at all, so testing after a new or untreated partner matters even when you feel fine.
In this guide
Common STD symptoms in men
Most STDs in men show up in one of three ways: irritation of the urethra (the tube you pee through), skin changes on or around the genitals, or general "flu-like" symptoms. Watch for:
- Burning or stinging when you urinate. This is the classic sign of urethritis, most often from chlamydia or gonorrhea.
- Discharge from the penis. Gonorrhea tends to cause thicker white, yellow or green discharge; chlamydia and trichomoniasis more often cause a small amount of clear or cloudy fluid, sometimes only noticed first thing in the morning.
- Itching or irritation inside the penis, or burning after ejaculation, which can point to trichomoniasis.
- Sores, blisters or bumps. Painful clusters of blisters suggest herpes. A single firm, painless sore suggests syphilis. Soft, flesh-colored bumps are usually genital warts from HPV.
- Pain or swelling in one testicle. This can mean an infection has spread to the epididymis, the coiled tube behind the testicle.
- Rectal pain, discharge or bleeding, or a sore throat after oral sex, if those areas were exposed.
Symptoms by infection: a quick comparison
| Infection | Typical symptoms in men | How often there are no symptoms |
|---|---|---|
| Chlamydia | Mild burning, clear or cloudy discharge, rarely testicle pain | Very often silent |
| Gonorrhea | Burning, colored discharge, sometimes testicle pain | Men are more likely than women to notice symptoms, but not always |
| Trichomoniasis | Itching inside the penis, burning after urinating or ejaculating | About 70% of people have no symptoms (CDC) |
| Genital herpes | Tingling, then painful blisters that crust over | Many people never recognize an outbreak |
| Syphilis | Painless sore, later a rash (often on palms and soles) | The sore is easy to miss |
| HIV | Fever, sore throat, rash or swollen glands 2 to 4 weeks after exposure | Early symptoms are often mistaken for a virus |
Because symptoms overlap, you can't reliably tell which infection you have by looking. That is why testing, not guessing, decides treatment.
Noticed burning, discharge or a new sore? Get care from a nurse practitioner online.
$79 visit, no appointment needed. Adults 18+ in FL, NM, OR and WA.
Start a visit →Why "no symptoms" doesn't mean no infection
Silent infections still spread to partners, and some still cause harm. Untreated chlamydia or gonorrhea can lead to epididymitis and, uncommonly, fertility problems. Untreated syphilis can affect the eyes, nerves and brain years later. Having any STD also raises the chance of getting or passing HIV.
The good news: CDC's 2024 provisional data showed reported chlamydia, gonorrhea and syphilis cases fell for a second or third year in a row. But more than 2.2 million cases were still reported nationally, so these infections remain common.
When men should get tested, and which tests
Consider testing if you have any symptom above, a new partner, more than one partner, a partner who tested positive, or sex without a condom. Typical testing includes:
- Urine test (first-catch urine, ideally at least an hour after you last peed) for chlamydia, gonorrhea and often trichomoniasis.
- Throat or rectal swabs if you had oral or receptive anal sex, since a urine test will miss infections there.
- Blood tests for syphilis and HIV, and sometimes hepatitis B and C.
- A swab of a sore to confirm herpes or syphilis.
CDC recommends everyone ages 13 to 64 be tested for HIV at least once, and men who have sex with men be screened for chlamydia, gonorrhea, syphilis and HIV at least yearly, more often with higher risk. Testing too soon after exposure can miss an infection; your provider can help with timing.
How STDs in men are treated
Chlamydia, gonorrhea, trichomoniasis and syphilis are curable with antibiotics. Herpes and HIV are not curable but are very treatable with daily or as-needed medication. After treatment, avoid sex until you and your partners are done with treatment (usually 7 days after a single-dose treatment or until a 7-day course is finished), and plan a retest in about three months, because reinfection is common.
At OurTopClinic, a nurse practitioner licensed in your state can review your symptoms online, order lab testing near you, and prescribe treatment when it's appropriate. Some STDs need an in-person step, such as the injection used for gonorrhea or a swab of a sore, and we'll tell you if that's the case.
Get in-person care or call 911 if you have:
- Severe or sudden pain in a testicle, especially with swelling (this can be testicular torsion, an emergency)
- Fever, chills or feeling very ill along with genital symptoms
- A rash with fever, vision changes, severe headache or confusion
- Inability to pee or severe pain with urination
Frequently asked questions
How soon do STD symptoms show up in men?
It depends on the infection. Gonorrhea often causes symptoms within about 2 to 7 days if it causes any, chlamydia within 1 to 3 weeks, herpes within about 2 to 12 days, and a syphilis sore around 3 weeks (range 10 to 90 days). Many infections never cause symptoms, so testing is the only way to know.
Can a man have an STD and not know it?
Yes. Chlamydia and trichomoniasis are often completely silent in men, and a syphilis sore can be painless and hidden. You can still pass these infections to partners, which is why testing after a new partner is recommended.
Is burning when I pee always an STD?
No. Burning can also come from a urinary tract infection, prostatitis, kidney stones or irritation. In younger, sexually active men, though, chlamydia and gonorrhea are common causes, so a urine STD test is usually part of the workup.
Sources
Keep reading
- STD Testing Online in Florida: Which Tests You Need and How It Works
- STD Symptoms in Women: Signs of Chlamydia, Gonorrhea, Trich, Herpes and Syphilis
- Chlamydia Treatment: Doxycycline, What to Expect and When to Retest
- Browse all conditions and treatments A to Z
Noticed burning, discharge or a new sore? Get care from a nurse practitioner online.
$79 visit, no appointment needed. Adults 18+ in FL, NM, OR and WA.
Start a visit →
Naurah Gaspard, DNP, FNP-C, FNP-BC
Board-certified family nurse practitioner licensed in Florida, New Mexico, Oregon and Washington, caring for adults online at OurTopClinic. Meet our providers.
This article is for general education and is not a substitute for medical advice. Treatment, including any prescription, is decided by a licensed provider after reviewing your health history. OurTopClinic is not for emergencies; if you have a medical emergency, call 911. OurTopClinic serves adults located in Florida, New Mexico, Oregon and Washington. Learn more at ourtopclinic.com.
