Sometimes called wear-and-tear-arthritis, osteoarthritis is the most common cause of joint pain. It occurs when the lining of the joints, called cartilage, is worn down. Although osteoarthritis can damage any joint, it most commonly affects the knees, hands and hips.
Joint pain can have causes that aren't due to underlying disease. Examples include overuse such as heavy physical activity, lack of use, sprains, or strains.