Acute epididymitis is an inflammation of the epididymis. This is a structure that surrounds and attaches to each testicle. It is shaped like a tube. The epididymis helps transport and store sperm cells.

Chronic epididymitis causes discomfort or pain in the epididymis. It can last for three months or longer. This type is less common.

The Epididymis
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This condition is most often caused by a bacterial infection. For example:

Other causes include:

  • Injury
  • Viral infections, such as mumps
  • Genital abnormalities
  • Treatment with amiodarone (Cordarone), a heart rhythm drug
  • Chemotherapy to treat bladder cancer