A sprained ankle can happen when your foot turns inward. This can put extreme tension on the ligaments of your outer ankle and cause the sprain. A sprained knee can be the result of a sudden twist. Wrist sprains most often occur when you fall on an outstretched hand. Your bones are supported by a combination of muscles and tendons.
Tendons connect muscles to bones.
A strain is the result of an injury to either a muscle or tendon, usually in your foot or leg. The treatment for a sprain is the same as for a strain. This should be followed by simple exercises to relieve pain and restore mobility. For a serious tear, you may need surgery. Do not wait to call the doctor if your sprained joint won't bear weight or move normally, the pain becomes intolerable, or the swelling or bruising increases despite treatment.