Causes of Nongonococcal Urethritis
Nongonococcal urethritis (NGU) occurs when the urethra becomes inflamed due to a cause other than the bacterium Neisseria gonorrhoeae. The most common cause is a bacterial infection transmitted through sexual contact. Chlamydia trachomatis is responsible for a significant number of cases. Other bacteria, such as Mycoplasma genitalium and Ureaplasma urealyticum, are also frequent causes. In some instances, the condition is caused by a virus, such as the herpes simplex virus or adenovirus, or by a parasite called Trichomonas vaginalis. Occasionally, NGU has non-infectious causes. These can include physical trauma from a catheter or vigorous sexual activity, or chemical irritation from soaps, spermicides, or lotions.

Risk Factors
Certain behaviors and factors increase the likelihood of developing NGU. Being a sexually active male, particularly under the age of 25, is a primary risk factor. Engaging in unprotected sex or having sex with multiple partners significantly raises the risk of exposure to the bacteria that cause the condition. A history of previous sexually transmitted infections (STIs) is also a strong predictor. While NGU is diagnosed in men, women can carry the organisms that cause it and pass them to male partners during sexual activity.

Prevention Strategies
Primary prevention focuses on safe sexual practices to avoid infection. Consistently using condoms during all forms of sexual activity—vaginal, anal, and oral—greatly reduces the risk of transmission. Limiting the number of sexual partners and being in a mutually monogamous relationship with an uninfected partner are effective strategies. Regular STI screening is important for sexually active individuals to detect and treat infections before they cause symptoms or are passed to others. Avoiding irritants like harsh soaps or chemical products in the genital area can help prevent non-infectious forms of urethritis.

Signs and Symptoms
Symptoms of nongonococcal urethritis usually appear one to five weeks after infection, although some men may not experience any noticeable symptoms at all. When symptoms do occur, they are generally localized to the urethra and penis. Common signs include:

• A burning or stinging sensation during urination (dysuria).
• White, cloudy, or watery discharge from the tip of the penis.
• Itching, irritation, or tenderness near the opening of the penis.
• Staining of underwear due to discharge.

How It Is Diagnosed
Clinicians identify NGU by reviewing a patient's sexual history and symptoms, followed by a physical examination of the genital area to check for discharge or redness. To confirm the diagnosis and identify the specific cause, a urethral swab or a urine sample is collected. These samples are tested using nucleic acid amplification tests (NAATs) to detect genetic material from bacteria like Chlamydia or Mycoplasma. A Gram stain test involves looking at secretions under a microscope to verify the presence of white blood cells (indicating inflammation) and to rule out gonorrhea. If gonorrhea bacteria are not seen but inflammation is present, the diagnosis is typically NGU.

Differential Diagnosis
It is important to distinguish NGU from other conditions with similar symptoms. The primary distinction is made against gonococcal urethritis, which is caused specifically by gonorrhea. Doctors also consider urinary tract infections (UTIs), which affect the bladder or kidneys, and prostatitis, which is inflammation of the prostate gland. Mechanical irritation or allergic reactions to hygiene products are also considered if no infection is found.

Medical Treatment
The primary treatment for nongonococcal urethritis involves antibiotics to eliminate the bacteria causing the infection. Common medications prescribed include doxycycline, taken twice daily for a week, or a single dose of azithromycin. If the infection is caused by Mycoplasma genitalium or Trichomonas, different antibiotics like moxifloxacin or metronidazole may be required. It is crucial to finish the entire course of medication even if symptoms improve quickly to ensure the infection is fully cleared. Because NGU is often sexually transmitted, all sexual partners from the last 60 days should be notified, tested, and treated to prevent reinfection.

Management and Self-Care
While recovering, patients must abstain from sexual activity usually for seven days after starting treatment and until symptoms have resolved and partners have been treated. This prevents passing the infection back and forth. Patients should avoid harsh chemicals or soaps in the genital area that could worsen irritation. Drinking plenty of water can help flush the urinary tract, though it does not cure the infection itself.

When to Seek Medical Care
Men should see a healthcare provider if they notice any discharge from the penis, pain with urination, or genital irritation. Immediate care is recommended if symptoms include severe pain in the testicles, which could indicate the infection has spread. Follow-up is generally not needed if symptoms resolve, but patients should return to the doctor if symptoms persist or recur after finishing antibiotics, as this may indicate a resistant bacterial strain or a different underlying cause.

Severity and Complications
Nongonococcal urethritis is generally considered a mild to moderate condition. Most cases are uncomplicated and limited to the urethra. However, if left untreated, the infection can spread and cause more serious health issues. In men, the infection can travel to the epididymis (the tube that stores sperm), leading to epididymitis, which causes painful swelling of the scrotum and can potentially impact fertility. Rarely, a specific type of NGU caused by Chlamydia can trigger Reactive Arthritis (formerly known as Reiter’s syndrome), a condition causing joint pain, eye inflammation, and skin lesions. While NGU does not directly threaten life expectancy, these complications can affect long-term health and quality of life.

Prognosis and Recurrence
The prognosis for NGU is very good. Most infections clear up completely with the correct antibiotic treatment. Symptoms typically improve within a few days of starting medication. Recurrence is common, often due to reinfection from an untreated partner or failure to complete the medication course. In some cases, persistent symptoms may be due to

Impact on Daily Activities
For many people, nongonococcal urethritis causes temporary physical discomfort that can be distracting during work or school. The need to use the restroom frequently or the sensation of burning can be bothersome. The condition may also cause anxiety or embarrassment regarding sexual health and relationships. The requirement to abstain from sexual activity during treatment can temporarily impact intimate relationships. Open communication with partners is necessary but can be emotionally difficult.

Questions to Ask Your Healthcare Provider
To better understand the condition and ensure proper care, consider asking these questions:

• What specific bacteria or organism is causing my infection?
• Do I need to undergo testing for other sexually transmitted infections?
• How should I tell my recent sexual partners that they need to be tested?
• How long do I need to wait before it is safe to have sex again?
• What should I do if my symptoms do not go away after taking the medication?
• Are there any side effects I should expect from the antibiotics?

Q: Is nongonococcal urethritis the same thing as a urinary tract infection (UTI)?
A: No. While both affect the urinary system and cause pain during urination, a UTI typically involves the bladder and kidneys and is often caused by E. coli bacteria. NGU is inflammation specifically of the urethra and is usually sexually transmitted.

Q: Can I get NGU without having sex?
A: Yes, but it is less common. NGU can be caused by non-infectious triggers such as injury from a catheter, irritation from soaps or spermicides, or vigorous friction. However, bacteria from sexual contact are the most frequent cause.

Q: Will NGU go away on its own without treatment?
A: Symptoms might eventually disappear on their own in some cases, but the infection often remains in the body. Without antibiotic treatment, you remain contagious to partners and are at risk for complications like testicular infection or reactive arthritis.

Q: How do I know if my NGU is cured?
A: You are generally considered cured if you have completed your course of antibiotics and your symptoms have completely resolved. Retesting is usually not necessary unless symptoms persist or come back.

Q: Can women get nongonococcal urethritis?
A: The term NGU is primarily used to diagnose urethritis in men. However, women can be infected with the same bacteria (like Chlamydia) that cause NGU in men. In women, these bacteria often infect the cervix (cervicitis) or urethra, causing different symptoms or complications like pelvic inflammatory disease.