Foot drop will have symptoms such as abnormal gait, numbness on the back of the foot, and discomfort in the ankle joint. 1. Abnormal gait: the front muscles of the lower leg are weak, the foot can not be lifted up, so the affected limb can only be lifted off the ground when walking, this gait is also known as cross-threshold gait. 2. Numbness of the back of the foot: if peroneal nerve injury, there will be pain or numbness of the back of the foot. 3. Ankle discomfort: because of long-term foot drop, the ankle joint has no way to carry out normal activities, and in the long run, the ankle joint will have a stiff feeling. Patients with foot drop should be treated under the guidance of doctors, rehabilitation training under the guidance of rehabilitation doctors, and regular review during the treatment period.