Many STDs in males cause no symptoms at all, which is why infections spread so easily. When symptoms do appear, the most common signs include burning during urination, unusual discharge from the penis, sores or bumps on the genitals, and rashes. The specific symptoms depend on which infection you have, and the timeline from exposure to first signs ranges from a few days to several weeks.
Why Many Men Never Notice Symptoms
The majority of new STI cases worldwide are asymptomatic, according to the World Health Organization. This means you can carry and transmit an infection for weeks, months, or even years without any obvious signs. Chlamydia is especially notorious for this: most men with chlamydia feel perfectly fine. Gonorrhea, trichomoniasis, and even HIV can also go undetected without testing.
This is the single most important thing to understand about STDs in men. Waiting for symptoms to appear is not a reliable strategy. If you’ve had unprotected sex or a new partner, testing is the only way to know your status.
Chlamydia and Gonorrhea
These two bacterial infections cause nearly identical symptoms in men, so they’re hard to tell apart without a lab test. When symptoms do show up, they typically include a burning sensation when you pee, discharge from the penis, and occasionally painful or swollen testicles. Gonorrhea discharge tends to be white, yellow, or green. Chlamydia discharge is often thinner and less noticeable.
Gonorrhea symptoms often start within five days of exposure. Chlamydia takes a bit longer, usually 5 to 14 days. But again, many men with either infection experience nothing at all.
If gonorrhea infects the throat (from oral sex) or rectum, you may have a sore throat, rectal pain, or discharge from those areas instead. These infections at non-genital sites are especially likely to be missed because the symptoms are vague or absent entirely.
Genital Herpes
Herpes (caused by HSV-1 or HSV-2) produces small bumps or blisters around the genitals, anus, or mouth. These blisters eventually rupture into painful open sores that ooze or bleed, then form scabs and heal. The first outbreak is usually the worst, often accompanied by flu-like symptoms, body aches, and swollen lymph nodes near the groin.
Symptoms typically appear within 12 days of exposure, though some people don’t have a noticeable first outbreak for months or years. After the initial episode, herpes tends to recur. Outbreaks usually become shorter and less severe over time, but the virus stays in the body permanently. Between outbreaks, many men have no visible signs, yet the virus can still be transmitted.
Syphilis
Syphilis progresses through distinct stages, each with different symptoms. In the primary stage, a single sore (called a chancre) appears at the site where the infection entered your body, usually on the penis, scrotum, or around the anus. The sore is typically firm, round, and painless, which is why many men don’t notice it. It heals on its own within a few weeks, but the infection is still active and progressing.
In the secondary stage, a rash develops that can appear anywhere on the body, including the palms of your hands and soles of your feet. The rash looks rough, red, or reddish-brown. You may also experience fever, swollen lymph nodes, sore throat, patchy hair loss, and fatigue. Without treatment, syphilis eventually enters a hidden (latent) stage with no symptoms, and can later cause serious damage to the heart, brain, and other organs.
HIV
Acute HIV infection develops within 2 to 4 weeks after exposure. During this early stage, some men experience flu-like symptoms: fever, headache, rash, sore throat, muscle aches, and swollen glands. These symptoms are easy to dismiss as a cold or the flu, and they resolve on their own within a few weeks.
After this initial phase, HIV can remain silent for years while it gradually weakens the immune system. By the time more serious symptoms appear (frequent infections, rapid weight loss, chronic fatigue), significant immune damage may have already occurred. Early detection through testing makes a major difference in long-term health outcomes.
Trichomoniasis and Mycoplasma Genitalium
Trichomoniasis is caused by a parasite and is often thought of as a women’s infection, but men get it too. Most men with trichomoniasis have no symptoms. When symptoms occur, they show up 5 to 28 days after exposure and include itching or irritation inside the penis, mild discharge, and burning after urination or ejaculation.
Mycoplasma genitalium is a lesser-known bacterial infection that causes similar symptoms: discharge from the penis, pain while urinating, pain during ejaculation, and itching or tenderness. It’s increasingly recognized as a common cause of urethral irritation in men, particularly when chlamydia and gonorrhea tests come back negative.
HPV (Genital Warts)
Human papillomavirus is extremely common and usually causes no symptoms at all. When it does produce visible signs, it appears as genital warts: soft, flesh-colored growths that can be flat or raised, sometimes with a cauliflower-like texture. They show up on the penis, scrotum, groin, or around the anus. HPV warts are distinct from herpes blisters in that they’re painless, don’t rupture, and tend to grow slowly rather than appearing in a sudden outbreak.
Most HPV infections clear on their own within one to two years. Certain high-risk strains of HPV don’t cause warts but can increase the risk of cancers, particularly anal cancer in men who have sex with men.
Conditions That Look Like STDs but Aren’t
Some completely harmless skin features on the genitals get mistaken for STD symptoms. Pearly penile papules are tiny, dome-shaped bumps that ring the head of the penis. They’re normal anatomy, not an infection. Fordyce spots are small, pale dots on the shaft or foreskin caused by visible oil glands. Both are common, both cause significant anxiety, and neither requires treatment. If you’re unsure whether something you’ve noticed is normal or not, a quick visit to a clinic can give you a clear answer.
What Happens If STDs Go Untreated
Untreated chlamydia and gonorrhea can spread to the tube that carries sperm from the testicle, causing a painful condition called epididymitis. Symptoms include one-sided testicular pain, swelling, and tenderness that can last for weeks. If it happens repeatedly or isn’t treated promptly, it can lead to chronic pain or reduced fertility.
Untreated syphilis can cause irreversible damage to the nervous system and cardiovascular system. Untreated HIV progresses to AIDS. Untreated gonorrhea can, in rare cases, spread to the bloodstream and joints. The bacterial STDs (chlamydia, gonorrhea, syphilis, mycoplasma genitalium) are all curable with the right antibiotics. Viral infections like herpes, HIV, and HPV can’t be cured, but all have effective treatments that manage symptoms or prevent progression.
Screening Recommendations for Men
CDC guidelines recommend that all men aged 13 to 64 get tested for HIV at least once, even with no symptoms or known risk factors. Beyond that baseline, the screening schedule depends on your sexual activity.
Men who have sex with men should be screened for chlamydia, gonorrhea, syphilis, and HIV at least once a year, regardless of condom use. If you’re on PrEP, living with HIV, or you or your partners have multiple partners, the recommendation increases to every 3 to 6 months. Screening should cover all sites of contact, meaning throat and rectal swabs in addition to urethral testing.
For men who have sex only with women, routine screening for chlamydia and gonorrhea isn’t broadly recommended unless you’re in a higher-risk setting. Syphilis screening is recommended for men under 29 and those with specific risk factors. Hepatitis C screening is recommended for all adults over 18. If you’re being evaluated for any STD, your provider will typically test for several infections at once, since co-infection is common and symptoms overlap.