Chondromalacia patellae is a term used to describe the damage or softening of the cartilage on the underside of the kneecap. It is similar to patellofemoral pain syndrome (runner's knee) in which the pain is felt under and around the kneecap. This condition is common among young athletics but may also occur in older adults who have arthritis of the knee.
Hip bursitis is a common problem that causes pain over the outside of the upper thigh and hip joint. A bursa is a fluid-filled sac that allows smooth motion between two surfaces.