Primary treatment of acute ankle ligament injury is almost always conservative. The more severe injury is, the more careful initial treatment, rehabilitation and follow-up is required. If the rupture of ligaments is suspected, the ankle must be supported with an air splint or ankle support. Functional therapy is initiated immediately upon the occurrence of the injury. Independent training by the patient is the cornerstone of functional therapy. Persistence of symptoms or recurrent injuries are often due to inadequate rehabilitation.