Epididymitis is not always an STD, but it can be. The most common cause in sexually active men under 35 is a bacterial infection like chlamydia or gonorrhea. In older men or those who do not have sex with men, it is usually caused by a urinary tract infection or an enlarged prostate. Treatment depends entirely on the cause, which is why getting the right diagnosis matters.
What Causes Epididymitis?
The epididymis is a tube at the back of the testicle that stores and carries sperm. When it becomes inflamed, that is epididymitis. The causes split into two main groups: infections and non-infectious issues.
Infectious causes are the most common. Sexually transmitted infections (STIs) like chlamydia trachomatis and neisseria gonorrhoeae are responsible for most cases in sexually active men under 35. These bacteria travel from the urethra up into the epididymis. The CDC reports that chlamydia and gonorrhea are the leading bacterial STIs in the United States, and epididymitis is a known complication in men.
In men over 35, the cause is usually a non-STI bacterial infection. E. coli and other bacteria from the urinary tract are common culprits. An enlarged prostate can block urine flow, allowing bacteria to spread backward into the epididymis. Some men develop epididymitis after a prostate biopsy or from using a urinary catheter.
Non-infectious causes exist but are less common. These include trauma to the groin, urine reflux (when urine flows backward into the epididymis), and certain medications like amiodarone, a heart drug. In rare cases, tuberculosis can cause epididymitis, though this is more common in parts of the world where TB is widespread.
Is Epididymitis an STD? The Clear Answer
Epididymitis is not always an STD, but it can be. If you are sexually active and under 35, the odds are higher that an STI is the cause. If you are older or not sexually active, the cause is more likely a urinary tract infection or prostate issue.
The confusion happens because the symptoms look the same regardless of the cause. Pain, swelling, redness, and tenderness in the testicle area do not tell you whether the trigger was an STI or a UTI. Only lab testing can sort that out.
This distinction matters for treatment. Antibiotics for chlamydia and gonorrhea are different from antibiotics for E. coli. Using the wrong one will not help and may delay recovery. It also matters for your partner. If the cause is an STI, your sexual partner needs treatment too. If the cause is not an STI, there is no risk to your partner.
The CDC and the American Urological Association both recommend STI testing for anyone with epididymitis who is sexually active. This is standard practice, not a judgment. It is the only way to know for sure.
What Are the Symptoms of Epididymitis?
Symptoms usually develop gradually over a day or two. The most common sign is a dull ache in one testicle that gets worse over time. Swelling and redness of the scrotum on that side are typical. The area may feel warm to the touch.
Pain can spread to the lower abdomen or groin. Urinating may hurt or feel urgent. Some men notice discharge from the penis, which strongly suggests an STI. Fever and chills are possible but less common.
Symptoms can look similar to testicular torsion, which is a medical emergency. Torsion causes sudden, severe pain and requires surgery within hours to save the testicle. If you have sudden, intense testicular pain, go to an emergency room immediately. Do not wait to see if it gets better on its own.
One non-obvious point: painless swelling is not typical for epididymitis. If you have a swollen testicle with no pain, that is more likely a hydrocele, varicocele, or tumor. See a doctor either way, but the cause is different.
How Is Epididymitis Diagnosed?
Diagnosis starts with a physical exam and your medical history. The doctor will check for swelling, tenderness, and any discharge. They will ask about your sexual history and any recent procedures or injuries.
Urine tests are standard. A urinalysis can show white blood cells or bacteria. A urine culture can identify the specific bacteria causing the infection. If an STI is suspected, a urine test for chlamydia and gonorrhea is done. This is called a nucleic acid amplification test, and it is highly accurate.
Blood tests are not always needed but may be used to check for signs of infection or inflammation. An ultrasound of the scrotum is sometimes ordered. This imaging test can confirm inflammation of the epididymis and rule out other problems like a tumor or abscess. Ultrasound uses sound waves and has no radiation.
| Test | What It Detects | When It Is Used |
|---|---|---|
| Urinalysis | White blood cells, bacteria, blood in urine | First step for all patients |
| Urine culture | Specific bacteria causing infection | When bacteria are suspected |
| STI urine test (NAAT) | Chlamydia, gonorrhea | Sexually active men under 35 |
| Scrotal ultrasound | Inflammation, abscess, tumor, torsion | Unclear diagnosis or severe symptoms |
A key point: do not assume your doctor will automatically test for STIs. Some do not unless you ask or report symptoms. If you are sexually active, specifically ask to be tested for chlamydia and gonorrhea. This is your health, and you have the right to request the test.
What Are the Treatment Options for Epididymitis?
Treatment depends on the cause. For bacterial epididymitis, antibiotics are the standard. The specific antibiotic depends on which bacteria are found.
For STI-related epididymitis, the CDC recommends a single dose of ceftriaxone injected into a muscle, plus 10 to 14 days of doxycycline taken by mouth. This combination covers both gonorrhea and chlamydia. For non-STI bacterial epididymitis, antibiotics like levofloxacin or ciprofloxacin are commonly used. These cover E. coli and other urinary tract bacteria.
It is critical to finish the entire course of antibiotics even if you feel better. Stopping early can allow the infection to return and may contribute to antibiotic resistance. Your sexual partner needs treatment too if an STI is the cause. This prevents reinfection and protects their health.
Supportive care helps with comfort while antibiotics work. Rest with the scrotum elevated using a rolled towel can reduce swelling. Applying an ice pack wrapped in a cloth for 15 to 20 minutes at a time helps with pain. Over-the-counter pain relievers like ibuprofen or naproxen reduce inflammation. Avoid sexual activity until the infection is fully cleared.
- Finish all prescribed antibiotics, even if symptoms improve
- Rest and elevate the scrotum to reduce swelling
- Apply ice packs for short periods to manage pain
- Take anti-inflammatory medication as directed
- Avoid sex until your doctor confirms the infection is gone
- Notify sexual partners if an STI was the cause
For non-infectious epididymitis, antibiotics will not help. Treatment focuses on the underlying cause. If a medication like amiodarone is the trigger, switching to a different drug may resolve the problem. For urine reflux, avoiding heavy lifting and straining can help. Surgery is rarely needed but may be considered for chronic cases that do not respond to other treatments.
What Are the Risks of Untreated Epididymitis?
Untreated epididymitis does not go away on its own. It can lead to complications that affect your fertility and long-term health. The infection can spread from the epididymis to the testicle itself, causing orchitis. This combination of epididymitis and orchitis is more painful and harder to treat.
An abscess can form inside the scrotum. This is a pocket of pus that may need surgical drainage. In severe cases, the infection can spread into the bloodstream, a condition called sepsis. Sepsis is life-threatening and requires immediate hospital care.
Chronic epididymitis is another risk. This means the inflammation lasts for weeks or months even after the infection is gone. The exact cause of chronic epididymitis is not always clear. Some men develop ongoing pain and discomfort that affects daily life. Treatment for chronic cases is more complex and may include nerve blocks or physical therapy.
Fertility can be affected. The epididymis is where sperm mature and are stored. Scarring from the infection can block the passage of sperm, reducing fertility. Studies published in the Journal of Urology have found that men with a history of epididymitis have higher rates of abnormal sperm counts and motility. This risk is higher if treatment is delayed or the infection is severe.
Frequently Asked Questions
Can epididymitis go away without treatment?
No, bacterial epididymitis will not resolve on its own and requires antibiotics to prevent complications. Non-infectious cases may improve with rest but still need medical evaluation to rule out infection.
How long does it take for epididymitis to heal?
With proper antibiotics, symptoms usually improve within 48 to 72 hours. Full recovery can take several weeks, and some men have lingering discomfort for months.
Can you have sex with epididymitis?
You should avoid sex until the infection is fully treated and your doctor confirms it is gone. If an STI caused it, your partner also needs treatment before resuming sexual activity.
Is epididymitis contagious?
If an STI is the cause, the infection can be passed to sexual partners. If a non-STI bacteria or a non-infectious cause is responsible, it is not contagious.
