A rupture of the anterior talofibular ligament, which is an important ligament of the ankle joint and plays an important role in maintaining the stability of the ankle joint, can have the following manifestations. If the anterior talofibular ligament is ruptured, there may be significant pain in the front of the ankle joint, which may be accompanied by local bruising and ecchymosis, which is caused by local bleeding after the ligament rupture and may be accompanied by significant swelling. In addition, the rupture of the anterior talofibular ligament may be accompanied by significant limitation of ankle joint movement and ankle instability. Therefore, after a rupture of the anterior talofibular ligament, early diagnosis and treatment should be actively carried out, and the patient should pay attention to the MRI of the ankle joint at the time of injury, and suture repair should be given early after the diagnosis is confirmed. If suture repair is not possible, reconstruction should be given.