Knee osteoarthritis is a degenerative condition that often is associated with injury to the knee or being overweight. Other risk factors include age, heredity, gender, and more. Symptoms can include pain, swelling, joint warmth, stiffness, creaking sounds in the knees, as well as other signs. If you are diagnosed with knee OA, your doctor may prescribe knee braces, prescription medications, and other therapies, or in severe cases, surgery. Follow the links below to find WebMD's comprehensive coverage about how knee OA is caused, what it looks like, what the symptoms and treatments are, and much more.