Pain on the surface of the foot, often in the following conditions: a. Dermatophytosis. Mostly seen in the back of the foot skin breaks, local bacteria into the lymphatic vessels, causing acute inflammation, which can be manifested as redness, swelling and pain on the surface of the foot. Need to apply external 50% magnesium sulfate to reduce edema, intravenous application of penicillin, cephalosporin generation of antibiotics, anti-infective treatment. It is also necessary to rest in bed and avoid excessive activities to reduce the swelling and pain of the limb. Usually after 7-10 days, the pain and swelling of the foot surface can be gradually relieved. Second, lower limb artery occlusion. It is mostly seen in the occlusion of dorsalis pedis artery, posterior tibial artery and anterior tibial artery, causing ischemia and hypoxia of the foot causing pain. Patients are recommended to improve the lower limb arteriogram to clarify the severity of vascular occlusion and, if necessary, to perform stent implantation to restore blood flow to the vessels and reduce pain symptoms.