What Types of STDs Cause Genital Pain?

The STIs most likely to cause genital pain are genital herpes (painful blisters and sores), gonorrhea and chlamydia (burning urination, sometimes testicular or pelvic pain), and trichomoniasis (itching, soreness, and burning). Friction, yeast, urinary infections, and irritation feel almost identical, so only a test names the cause.

The short list of likely causes

Genital pain has a handful of usual suspects. On the STI side, the four worth ruling out are genital herpes, chlamydia, gonorrhea, and trichomoniasis. The same discomfort can come from trauma, skin irritation, and non-STI infections like yeast or a urinary tract infection.

These conditions overlap too much to tell apart by sight or by feel alone, and several of them are frequently silent. The pain you feel doesn't point cleanly to one diagnosis. A test settles which one, if any, it actually is.

Which STIs cause genital pain

Genital herpes

Genital herpes is the classic painful STI, caused by two viruses, herpes simplex virus type 1 (HSV-1) and type 2 (HSV-2) CDC. The tell-tale pattern is small blisters that break open into painful, raw sores on or around the genitals, rectum, or mouth. A first outbreak is usually the worst: the sores can take a week or more to heal, and many people run a fever with body aches and swollen glands, much like the flu.

Most people with herpes have no symptoms or only very mild ones, and most don't know they carry it; the majority of HSV-2 infections go undiagnosed. Repeat outbreaks tend to be shorter and milder than the first, and some people get a warning prodrome (tingling, itching, or a burning ache in the area) a day or so before sores appear. If you've already got a diagnosis and are weighing your options, see our guide to alternative herpes treatments.

Chlamydia

Chlamydia is caused by the bacterium Chlamydia trachomatis and is often called a 'silent' infection. Roughly three quarters of infected women and half of infected men feel nothing at all CDC. When it does cause pain, women may notice burning on urination, abnormal vaginal discharge, and, if the infection climbs higher into the reproductive tract, lower abdominal or low-back pain, pain during intercourse, fever, and bleeding between periods. Because it can spread this way, catching it early matters.

If symptoms show up, they usually appear within one to three weeks after exposure. With so many cases silent, the absence of pain doesn't rule chlamydia out.

Gonorrhea

Gonorrhea is caused by the bacterium Neisseria gonorrhoeae, and it can infect the genitals, rectum, and throat CDC. In men, the classic picture is burning when urinating plus a white, yellow, or green discharge from the penis; less often, the testicles become swollen and painful, a sign the infection has reached the tube behind the testicle. In women, most have no symptoms, but when they do, it's painful or burning urination, more vaginal discharge than usual, and bleeding between periods.

Gonorrhea and chlamydia produce nearly identical symptoms, so clinics routinely test for both at the same time. You can't reliably tell them apart by how it feels.

Trichomoniasis

Trichomoniasis is caused by a protozoan parasite, Trichomonas vaginalis, and it's the most common curable STI CDC. Its hallmark is irritation: itching, burning, redness, or soreness of the genitals, discomfort when urinating, and a discharge that may be clear, white, yellowish, or greenish, sometimes with a fishy smell. Men far more often feel nothing, but when they do it's itching inside the penis, burning after urinating or ejaculating, and occasionally discharge.

About seven in ten people with trich have no signs at all. When symptoms appear, they may show up anywhere from about 5 to 28 days after infection, though they can also start much later, which makes the timeline an unreliable clue. There's more on the patterns in our breakdown of trichomoniasis symptoms.

When it's NOT an STI

Not every case of genital pain comes from an STI. The same burning, itching, or soreness can come from physical trauma (vigorous sex, friction, a minor injury), skin irritation from soaps, lubricants, spermicides, or shaving, and non-STI infections like yeast overgrowth or a urinary tract infection. A UTI causes the burning-with-urination that people instantly assume is gonorrhea, and yeast causes itching and discharge that mimic trich.

This is why self-diagnosis fails so often. The non-STI causes share symptoms with the STI causes, and treating the wrong one wastes time while the real problem keeps going.

How to tell them apart

A few features point in a direction, even if they don't confirm anything. Painful blisters or open sores strongly suggest herpes, since the other STIs here don't blister. Burning urination plus a colored discharge leans toward gonorrhea or chlamydia. Intense itching with a frothy or fishy discharge leans toward trichomoniasis. Burning with urination but no discharge and a constant urge to go is more typical of a UTI.

These patterns overlap too much to settle by sight alone, and the silent infections leave no pattern to read at all. Only a test tells you which one, if any, you have.

Side-by-side comparison

How it's tested

Testing is straightforward and depends on what's suspected: a urine sample, a self-collected swab, or a quick exam. For all four of these, a nucleic acid amplification test (NAAT) is the preferred method. For chlamydia and gonorrhea it's the recommended screen, and gonorrhea NAATs run high in both sensitivity and specificity CDC, 2021, and for trich the NAAT is preferred on a vaginal swab or female urine. When sores are present, herpes is confirmed by swabbing a lesion for type-specific NAAT or culture CDC. Testing is free or low-cost at health departments, Planned Parenthood, and Title X clinics, with results usually back in a few days. Here's how to get tested.

What to do next

If you have genital pain, get tested rather than guess. Overlapping symptoms are why you can't reliably self-diagnose, and a test turns a guess into an answer. If you were recently exposed, check when to test after exposure so you don't test too early and get false reassurance. All four of these STIs are treatable, and chlamydia, gonorrhea, and trich are curable; once you know the cause, treatment is quick.

Red flags, when to get seen urgently

Most genital pain can wait for a routine appointment, but some signs mean go now rather than later:

• Severe lower abdominal or pelvic pain with fever, which can signal infection spreading into the reproductive tract.
• Swollen, very painful testicles, a sign the infection may have reached the tube behind the testicle, which can affect fertility if left untreated.
• A first herpes outbreak with high fever, severe pain, or trouble urinating from the sores.
• Pain during pregnancy with any discharge, sores, or bleeding. Get evaluated promptly to protect both you and the baby.
• Any sore or symptom that's rapidly worsening rather than slowly healing.

Keep exploring on EasySTD: your risk of an STD, the best at-home STD tests and Chlamydia testing.