A sprain occurs when you overstretch or tear your ligaments — the tough bands of fibrous tissue that connects two bones together in your joints. The most common location for a sprain is in your ankle.
A strain occurs when you overstretch or tear your muscle or tendon. A tendon is a fibrous cord of tissue that connects muscles to bones. Strains most likely occur in the lower back and in the hamstring muscle in the back of your thigh.
To treat a sprain or a strain, use rest, ice, compression and elevation. If the injury is severe, you may need surgery to repair torn ligaments, muscles or tendons.