Merck Manual

Please confirm that you are not located inside the Russian Federation

honeypot link
Quick Facts

Epididymitis and Epididymo-orchitis


The Manual's Editorial Staff

Last full review/revision Jan 2020| Content last modified Jan 2020
Click here for the Professional Version
Get the full details
Topic Resources

The testicles are the pair of organs that sit in the sac below a man's penis. The epididymis is the coiled tube on top of each testicle where sperm are moved from the testicle and stored. Doctors use the term "itis" to mean that an organ is inflamed. For example, orchitis means inflammation of the testicle.

What are epididymitis and epididymo-orchitis?

Epididymitis is painful inflammation of the epididymis.

Epididymo-orchitis is painful inflammation of both the epididymis and testicle.

  • Epididymitis and epididymo-orchitis usually start from a bacterial infection

  • Doctors treat these disorders with antibiotics

Male Reproductive Organs

Male Reproductive Organs

What causes epididymitis and epididymo-orchitis?

Epididymitis and epididymo-orchitis are usually caused by a bacterial infection. The infection can be caused by:

Sometimes, you can get epididymitis or epididymo-orchitis without having an infection. Doctors think this may be caused by some urine flowing backward and causing irritation.

What are the symptoms of epididymitis and epididymo-orchitis?

The symptoms of epididymitis and epididymo-orchitis are:

  • Swelling and tenderness near one of the testicles

  • Pain, which can be constant and severe

  • Sometimes, feeling sick and throwing up

  • Sometimes, fever

Pain from epididymitis usually comes on gradually. Pain from epididymo-orchitis usually comes on more rapidly.

If you have a sexually transmitted disease (STD), you may also have other symptoms, such as a discharge (clear, yellow, or green fluid coming out of your penis).

Epididymitis and epididymo-orchitis usually get better fast with treatment. But sometimes inflammation can happen again or last several weeks (chronic epididymitis).

How can doctors tell if I have epididymitis or epididymo-orchitis?

Doctors suspect epididymitis or epididymo-orchitis based on a physical examination. They'll usually also do:

  • A urine test to look for infection

  • Sometimes, ultrasound, to be sure that you don't have a twisted testicle (testicular torsion)

How do doctors treat epididymitis and epididymo-orchitis?

Doctors will have you:

  • Take antibiotics

  • Take pain medicine

  • Rest as much as needed

  • Use ice packs on the painful area

  • Wear a jockstrap (athletic supporter) to support your testicles

If the infection gets worse and you have an abscess (collection of pus), your doctor will do surgery to drain the pus.

NOTE: This is the Consumer Version. DOCTORS: Click here for the Professional Version
Click here for the Professional Version


Others also read

Test your knowledge

Motion Sickness
Motion sickness includes symptoms, particularly nausea, that affect people while they ride in a moving object. The object can be a transport vehicle such as a car, boat, train, or airplane, or an amusement park ride. A contributing factor is over-stimulation of a part of the body involved in balance control. Which of the following is that body part?
Download the Manuals App iOS ANDROID
Download the Manuals App iOS ANDROID
Download the Manuals App iOS ANDROID

Also of Interest

Download the Manuals App iOS ANDROID
Download the Manuals App iOS ANDROID
Download the Manuals App iOS ANDROID