Mild external ankle sprain-injury to the anterior talofibular ligament only or combined with a mild injury to the heel-fibular ligament. Diagnosis: 1. History of post-rotation injury 2. Local swelling, bruising, and claudication. 3, lateral ankle pressure pain. Treatment: 1. On-site treatment: pressure on the painful spot immediately after injury to stop bleeding, ice and pressure dressing. 2. Outpatient examination to confirm the diagnosis of lateral ankle ligament sprain or partial rupture with normal joint stability. For lighter injuries, sticky plaster support tape fixation, elastic bandage bandage, early activity. For more severe sprains, plaster fixation for 4-6 weeks. 3, after examination of the heel-fibular ligament no tear patients and simple anterior talofibular ligament rupture may not be operated. 4. According to the doctor’s recommendation, carry out corresponding rehabilitation exercises for ankle joint strength and mobility.