The back of the foot sprain, you can use the following methods to determine whether it is a soft tissue injury, or fracture: first, from the clinical symptoms, most soft tissue injuries will only have localized swelling, pain, bruising, limited activity, the patient can still insist on walking, weight bearing. Fractures, on the other hand, will lead to localized deformity, abnormal activities, passive activities can be heard bone friction sound as well as touch bone friction sensation. Secondly, X-rays can be taken to directly determine whether the localized injury is a fracture or a soft tissue injury. If there is a fracture, there will be discontinuity and interruption of the bone cortex. If there is only a soft tissue injury, the radiograph will not show any interruption of the bone cortex. Through the above two methods, you can accurately determine whether the sprained instep is a fracture or a soft tissue injury.