Urethritis is not always a sexually transmitted disease, but it is most often caused by one. The majority of urethritis cases result from STI-causing bacteria like chlamydia and gonorrhea, though non-sexual causes such as physical irritation, catheter use, and chemical sensitivities can also inflame the urethra.
What Urethritis Actually Is
Urethritis is inflammation of the urethra, the tube that carries urine out of your body. It’s not a disease in itself so much as a reaction, and that reaction can be triggered by infections (sexually transmitted or otherwise) or by non-infectious irritants. The discomfort is similar regardless of the cause: burning during urination, an increased urge to go, and sometimes discharge from the urethral opening.
Doctors split infectious urethritis into two categories: gonococcal (caused by the gonorrhea bacterium) and nongonococcal, which covers everything else. This distinction matters because the treatments differ, but both types are overwhelmingly linked to sexual transmission.
STI-Related Causes
Sexually transmitted infections are responsible for the vast majority of urethritis cases. The incidence of STI-related urethritis in the United States holds steady at roughly 250 per 100,000 men. The key pathogens break down like this:
- Chlamydia is the single most common cause of nongonococcal urethritis, responsible for up to 40% of cases. It often produces mild or no symptoms, which means people can carry and spread it without realizing.
- Gonorrhea tends to cause more noticeable symptoms, including heavier discharge and more intense burning. In 2023, roughly 601,000 gonorrhea cases were reported in the U.S., with rates higher in men than women.
- Mycoplasma genitalium accounts for 15% to 25% of symptomatic nongonococcal cases and is increasingly difficult to treat due to growing antibiotic resistance.
- Trichomonas vaginalis, a parasitic infection more commonly associated with vaginal infections, can also infect the urethra in both men and women.
Globally, the numbers are enormous: an estimated 128.5 million new chlamydia infections and 82.4 million new gonorrhea infections occur worldwide each year.
Non-Sexual Causes
A smaller but real portion of urethritis cases have nothing to do with sexual activity. These include:
- Physical irritation from activities that put pressure on the urethra, like prolonged cycling
- Chemical irritants such as spermicides, scented soaps, douches, scented tampons and pads, or lubricants
- Catheter use or urethral procedures that introduce friction or minor trauma
- Yeast infections
- Direct trauma to the genital area
If you’ve never been sexually active or your STI tests come back negative, these non-infectious causes are worth investigating. The symptoms can feel identical to STI-caused urethritis, so testing is the only reliable way to tell the difference.
Symptoms in Men vs. Women
In men, urethritis typically announces itself clearly: burning with urination, discharge from the tip of the penis (which can be clear, white, or yellowish), and sometimes itching or tenderness. Men’s longer urethra actually makes them less prone to urinary tract infections in general, but when the urethra itself is inflamed, symptoms are hard to ignore.
In women, urethritis is trickier. The symptoms overlap heavily with urinary tract infections and vaginal infections, making it easy to misidentify. Burning during urination, increased urgency, and lower abdominal discomfort are common. Women’s shorter urethra and its proximity to the vaginal opening make them more vulnerable to infection from multiple routes. More than 50% of women will experience a urinary tract infection at some point, and urethritis symptoms can easily be mistaken for one.
Both men and women can have urethritis with minimal or no symptoms at all, particularly with chlamydia. This is one reason STI screening matters even when you feel fine.
How It’s Diagnosed
Diagnosis usually involves a urine sample or a swab of urethral discharge. Your provider will test for gonorrhea and chlamydia specifically, and may test for other organisms depending on your risk factors. A simple urine test can also show signs of inflammation even before the specific pathogen is identified, which allows treatment to start quickly.
If an STI is confirmed, your recent sexual partners need to be notified and tested, even if they have no symptoms. Asymptomatic carriers are a major driver of ongoing transmission, especially with chlamydia.
Treatment and Recovery
When urethritis is caused by an STI, antibiotics typically clear it up. Gonorrhea and chlamydia each require different antibiotics, and if both infections are present (which happens frequently), you’ll be treated for both at once. Treatment is usually a short course, sometimes a single dose depending on the infection.
Mycoplasma genitalium can be more stubborn. Its growing resistance to standard antibiotics sometimes requires a two-step treatment approach, and your provider may need to confirm the infection has cleared with a follow-up test.
For non-infectious urethritis, treatment focuses on removing the irritant. Switching to unscented products, adjusting activities that put pressure on the area, or allowing time to heal after catheter use is often enough. Symptoms from chemical or physical irritation generally resolve within days to a couple of weeks once the trigger is gone.
Regardless of the cause, you should avoid sexual contact until treatment is complete and symptoms have fully resolved to prevent reinfection or spreading the infection to a partner.
What Happens If It’s Left Untreated
Untreated infectious urethritis can spread beyond the urethra. In men, the infection can travel to the epididymis (the coiled tube behind each testicle), causing pain, swelling, and in severe cases, fertility problems. Chronic prostatitis is another possible outcome.
In women, the consequences are potentially more serious. Chlamydia and gonorrhea can ascend into the uterus and fallopian tubes, causing pelvic inflammatory disease. PID can lead to chronic pelvic pain, scarring of the reproductive tract, ectopic pregnancy, and infertility. These complications are largely preventable with timely treatment, which is why getting tested at the first sign of symptoms, or through routine screening if you’re sexually active, makes a meaningful difference.