T13: Other injuries of lower limb, level unspecified

T13.5: Injury of unspecified muscle and tendon of lower limb, level unspecified

You have injured one or more tendons or muscles. Tendons are made up of very firm connective tissue. Tendons attach muscles to bones. Muscles and tendons enable corresponding parts of the body to be moved. If an injury occurs, the problems depend on which muscle or tendon has been damaged. You may be in pain or you may no longer be able to move affected areas properly, for example.