Epididymitis

Also called Epididymo-orchitis or Inflamed testicle

Epididymitis is inflammation of the epididymis, the coiled tube at the back of the testicle that stores and carries sperm. When the testicle is also affected, it is called epididymo-orchitis. It is usually caused by an infection, often a sexually transmitted infection in younger men or a urine infection in older men.

Last updated Nov 9, 2026

What it is

It is treated with antibiotics, along with rest, painkillers and supporting the scrotum. Sexual partners may need testing and treatment.

Sudden severe testicle pain can also be testicular torsion, which is an emergency, so it needs checking quickly.

Common signs

  • Pain and swelling in one testicle, coming on over a day or two
  • The scrotum feeling warm and tender
  • Discharge from the penis or pain when peeing
  • Fever

How it is usually diagnosed

  • Examination
  • Urine tests and swabs for infections
  • Ultrasound in some cases

Records worth keeping

Keeping these together makes each appointment easier, especially when you see a new doctor:

  • Test results
  • Antibiotics given
  • Ultrasound reports

Questions to ask your doctor

  • What caused the infection?
  • Do my partners need to be tested?
  • When should the swelling go down?

When to get help right away

Call 112 or go to the nearest emergency department if you have:

  • Sudden severe pain in a testicle: go to an emergency department straight away, it may be torsion

This page is general information. It is not a diagnosis and does not replace a doctor who knows your history. Medfold keeps your records organised; it does not interpret them.

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