Hip osteoarthritis is a degenerative disease affecting the hip joint. Symptoms include stiffness, pain, swelling, and sound or feeling of bone rubbing bone. When treating OA of the hip, the main goal is to reduce pain and improve mobility. Treatments may include exercise, surgery, medications, assistive devices, and more. Follow the links below to find WebMD's comprehensive coverage about how hip OA is caused, diagnosed, treated, and much more.