Ankle ligament strain ten days has not reduced the swelling, considering that it is caused by soft tissue injury, long-term immobilization, improper care and other reasons. 1. Soft tissue injury: ligament strain, generally accompanied by local soft tissue injury, soft tissue injury will appear after the blood circulation, thus causing swelling. 2. Prolonged immobilization: If the ligament strain is more serious, it needs to be immobilized by plaster or brace, and prolonged immobilization will lead to certain influence on the lymphatic and venous return function, which will also cause swelling. 3. Improper care: such as prolonged prolongation of the limb, premature activity, etc., which may have an impact on blood return, thus causing swelling to recur. The above treatments need to be carried out under the guidance of a doctor.