It usually takes about a month to recover from a sprained foot, and the first thing to look for is whether there is ligament damage, which will require an MRI. Through the MRI if only ligament contusion, continuity is complete, as long as the elastic bandage or ankle brace can be fixed, and then use anti-inflammatory, pain medication and swelling medication for symptomatic treatment, one month after the elastic bandage can be removed, the tissue can be cured. If the ligament is ruptured, it is necessary to carry out surgical treatment and surgery to rebuild the integrity of the ligament. After the operation, the ligament is also immobilized with a brace, and the functional exercise is started after removing the brace in about one month, and the recovery period of ligament rupture is about three months.