People can often treat sprains and strains at home. A sprain is an overstretched, torn, or twisted ligament. A ligament is a tough band of fibrous tissue that connects bones to other bones or cartilage. Ligaments are usually located around joints.
The most common causes of sprains are falling, twisting, or experiencing trauma to the joint. These types of injuries may cause the joint to move out of its normal range of movement, tearing or stretching the ligament as this happens.
Walking or exercising on an uneven surface, landing awkwardly from a jump
Pivoting during an athletic activity
Landing on an outstretched hand during a fall
Skiing injury or over extension when playing racquet sports, such as tennis