Reactive arthritis is classified as an autoimmune condition that develops in response to an infection in another part of the body (cross-reactivity). The arthritis often is coupled with other characteristic symptoms; this is called Reiter's syndrome or Reiter's arthritis. The manifestations of Reiter's Syndrome include the following triad of symptoms: an inflammatory arthritis of large joints, inflammation of the eyes in the form of conjunctivitis or uveitis, and urethritis in men or cervicitis in women. Patients can also present with mucocutaneous lesions, as well as psoriasis-like skin lesions such as circinate balanitis, and keratoderma blennorrhagicum. Enthesitis can involve the Achilles tendon resulting in heel pain.
