The term 'sometimes-sprained joint' refers to the ANKLE, which is a joint located between the foot and the leg. It is made up of three bones and is responsible for supporting the body's weight and allowing movement. The ANKLE is particularly prone to sprains due to its location and the amount of force it must bear. Sprains occur when the ligaments that hold the bones together are stretched or torn, causing pain and swelling. Treatment for a sprained ANKLE typically involves rest, ice, compression, and elevation.