What is it?

Orchitis is an inflammation of one or both testicles. It can be the cause of a bacterial or viral infection. Frequently, bacterial orchitis is associated or caused by epididymitis - an inflammation or infection of the epididymis which is a tube that connects a testicle to a sperm duct. Often, the cause of the infection is an STI - sexually transmitted disease. Viral orchitis can be caused by mumps virus.

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Additional names

This group contains additional names:
- Inflammation of testicles

Signs & symptoms

Orchitis symptoms may include: swelling in one or both testicles, pain, redness in the area, fever, nausea and vomiting, or testicular lumps.


Diagnosis of orchitis most likely starts with asking about your symptoms, medical history, sexual contacts, and known diseases. Then, you doctor may check your testicles for pain, redness or lumps. He or she may check your penis for any lesion or discharge, and your groin lymph nodes for swelling. Based on your findings, your doctor may recommend on urine tests, screening for STI, or testicular ultrasound.


Treatment depends on the cause of orchitis. Antibiotics are treatment suited for bacterial orchitis. If the cause of the bacterial infection is an STI, your sexual partner should be checked for STI and get treatment if found positive. In case of viral orchitis, the treatment is aimed at relieving symptoms. Nonsteroidal anti-inflammatory drugs, such as Advil or Addex, may be the right first line of choice.

☝️ This is not a substitute for professional medical advice. Please consult with your physician before making any medical decision.

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