A sprain is an injury to a joint, usually involving the tearing or stretching of ligaments. It occurs when there is too much force applied to the joint, causing it to move out of its normal position. This can result in pain, swelling and difficulty moving the affected area. Sprains are commonly caused by sudden movements or accidents, such as falling awkwardly or twisting a joint during physical activity. The severity of a sprain depends on how badly the ligament is damaged - it can range from a mild strain to a complete tear. Treatment typically involves rest, ice, compression and elevation, along with pain medication if necessary. In more severe cases, surgery may be required to repair the damage.