Reactive Arthritis

Reactive arthritis (Reiter’s syndrome) is a rare, temporary form of inflammatory arthritis that’s triggered by a bacterial infection. It causes pain and stiffness in your joints, especially in your lower body. It can also cause symptoms in other body tissues, like your eyes and skin, as well as whole-body symptoms like fatigue. But unlike most types of arthritis, it’s not a lifelong condition, and it usually lasts for less than a year.

Reactive arthritis happens when an infection in your urinary tract, genitals, digestive system or throat triggers an unusual reaction from your immune system. Your immune system normally generates inflammation to fight infections. But with Reiter’s syndrome, your immune system sends inflammation to places in your body where the infection never was. It’s as if it’s not convinced that the battle is over.