This document provides a comprehensive overview of osteoarthritis, including its definition, causes, risk factors, signs and symptoms, diagnosis, treatment options, self-care strategies, and the role of yoga and complementary therapies. It describes how osteoarthritis results from the breakdown of cartilage in joints, most often affecting the hands, spine, knees and hips. Risk factors include age, genetics, injury and obesity. Treatments include medications, exercise, weight control, and in some cases surgery.