Thin legs after triple ankle fracture is a manifestation of muscle atrophy, which is a common postoperative complication and a normal phenomenon. However, if there is nerve damage caused by muscle atrophy, most of them are not normal. 1. Muscle atrophy caused by long-term braking: this situation is mostly related to long-term braking of the affected limb and lack of systematic rehabilitation, generally after proactive muscle exercise, correct rehabilitation training, and gradually walking on the ground with weight bearing, it can be gradually recovered. 2. Muscle atrophy caused by nerve injury: generally, most of these cases are directly related to nerve injury, and need to perform electromyography to determine the degree of nerve injury. At the same time, targeted nutritional nerve rehabilitation therapy, there is hope for recovery. Postoperative muscle atrophy is a common complication, need to actively cooperate with the rehabilitation, through the rehabilitation of most of the recovery, but for the nerve damage caused by the situation, need to be targeted to improve the examination and targeted treatment.