The causes of dorsiflexion and extension limitation include trauma, ankle impingement syndrome, cerebrovascular disease, etc. The treatments include physical therapy, medication and surgery. 1. Trauma: such as lateral collateral ligament injury, medial collateral ligament and inferior tibiofibular ligament injury. If the symptoms are mild, ankle cast or ankle brace can be used to immobilize the ankle joint, and pressure bandage and cold compress can be applied. For severe pain, oral anti-inflammatory and analgesic drugs such as ibuprofen can be taken. If the injury is serious, such as ligament rupture, fracture, etc., surgery can be used to close, reset and immobilize the ankle joint. 2. Ankle impingement syndrome: including anterior and lateral, anterior, anterior and posterior ankle impingement syndrome. If the pain is severe, anti-inflammatory and analgesic drugs such as ibuprofen and diclofenac sodium can be taken. Generally, surgery is needed for complete treatment, such as arthroscopic osteotomy. 3. Cerebrovascular diseases: such as cerebral infarction, cerebral thrombosis, etc., can take drugs to improve cerebral vascular circulation, such as edaravone, cerebral neuroprotective drugs, such as olanzapine. If necessary, surgical treatment such as stenting, mechanical thrombectomy and angioplasty can be taken. Rehabilitation exercises can be performed for patients who cause unfavorable limb flexion and extension, such as limited dorsiflexion and extension of the foot. In addition to the above diseases, lumbar disc herniation and localized nerve compression can also cause the above symptoms. It is recommended to go to the hospital, complete the examination to clarify the cause of the disease, and then give targeted treatment. All of the above medications should be used under the guidance of a doctor, avoid self-medication.