Psoriatic arthritis is a long-term inflammatory disease that happens when your immune system attacks your joints and skin. But where the symptoms appear on your body depends on which of the five types ...

Spondyloarthropathies are forms of arthritis that usually strike the bones in your spine and nearby joints. They can cause pain and sometimes damage joints like your backbone, shoulders, and hips.

A joint is where two bones meet. Synovial joints are one of three types of joints in the body. Synovial joints are unique because they contain a fibrous joint capsule with synovial fluid. Hinge and ...