After breaking the foot ligament has not torn can be through clinical manifestations, physical examination, imaging and other aspects to determine and confirm the diagnosis. 1. Clinical manifestations: the typical clinical manifestations of ligament rupture are pain, swelling and limitation of activities. If there is severe pain in the ankle joint, obvious local swelling, subcutaneous bruising or ecchymosis, inability to bear weight or pain aggravated by weight bearing, and limitation of ankle joint activities after breaking the ankle, it is initially judged that there may be a ligament rupture. 2. Physical examination: when pressing the injured part during physical examination, there is obvious pressure and pain, accompanied by poor joint stability, joint instability and weakness, in this case, there may be ligament rupture. If the doctor finds that the pain is aggravated when the stress of internal rotation is passively applied, but no pain when external rotation is applied, it is often the injury of lateral collateral ligament, and vice versa, it is the injury of medial collateral ligament. 3. Imaging examination: Imaging examination is the best medical examination means to check ligament rupture of broken foot, such as MRI examination, which can accurately determine the location and degree of rupture, so as to facilitate the targeted treatment. It is recommended that the patient should consult a doctor in time after breaking his foot to see if there is a ligament rupture, and to be treated after clarifying the cause of the disease, so as to avoid delaying the condition.