Dear A.C.: In my opinion, the first thing you need is a diagnosis of what's causing your knee pain. Although osteoarthritis ...

Psoriatic arthritis is a chronic inflammatory condition that develops in people who have psoriasis. It can affect any joint, including your knee. Autoimmune conditions are caused by your immune ...

Another form of OA called post-traumatic arthritis develops years after an injury to a joint (such as a fractured knee or ruptured ligament). Rheumatoid arthritis (RA) is a chronic autoimmune ...