Reiter's syndrome (reactive arthritis) is a condition that may be triggered by a bacterial infection in the urinary or gastrointestinal tracts. It most often affects young men, although men of any age and women may also be affected.

Symptoms of Reiter's syndrome include:

• Pain, swelling, and inflammation of the joints (arthritis), especially where the pelvis attaches to the spine (sacroiliac joint) and in the fingers, toes, and feet.
• Inflammation of the eye (iritis).
• Inflammation of the tube that carries urine out of the body (urethra). There may be discharge from the end of the penis (urethritis).
• Discharge from the cervix, if it is affecting a woman.
• Skin rash or small sores (ulcers), especially on the penis, on the soles of the feet, or in the mouth.

A number of different medicines can be used to treat Reiter's syndrome.