We most frequently injure our knees in sports or other strain injuries.
Knees also wear out from years of weight bearing.
This results in arthritis and degeneration of cartilage. This is where the upper leg bone rubs directly on the lower leg bones and is very painful. Knee pain that occurs with walking can be from a posture problem and often responds well to a heel lift or arch supports. The soft tissues of the knees are often damaged from sports injuries . The ligaments, such as the famous cruciates, are often torn.