Walking foot pain after several years of sprains may be caused by ligament injuries, synovial inflammation, ischemic osteonecrosis, etc., which can be treated by medication, surgery and other ways. 1. Ligament injury: after sprain, it can lead to ligament injury such as partial tear of ligament, ligament laxity, etc. Untreated ligament injury can lead to prolonged ankle pain, and it may cause walking pain after several years of sprain. Ligament injuries can be relieved by surgical treatments such as repair and reconstruction of ligaments and ankle fusion surgery. 2. Synovial inflammation: after sprain, the synovial inflammation of the joint, if not completely cured, can form chronic inflammation, the repeated stimulation of inflammation, resulting in sprain for several years walking foot pain. Can follow the doctor’s instructions to take celecoxib tablets, ibuprofen extended-release capsules and other drugs, play the role of anti-inflammatory pain. If the situation is serious, arthroscopic minimally invasive surgery can be performed to clean up the inflamed synovium. 3. Ischemic Osteonecrosis: If the sprain causes ischemic osteonecrosis, resulting in vascular damage, ischemia, necrosis and other abnormalities of the bone, there may be a sprain for several years after walking foot pain. This condition can be relieved by ankle fusion surgery to remove the necrotic lesions. It is recommended to go to the regular hospital for examination and treatment to avoid further aggravation of the condition.