The causes of numbness on the surface of the foot are more, as follows: 1, inflammation: such as viral infections caused by neuritis, local tissue damage induced bacterial infection, resulting in symptoms of numbness on the surface of the foot; 2, traumatic factors: clinical need to actively give symptomatic treatment to further improve the symptoms; 3, nerve compression: lumbar spine lesions or sciatic neuropathy, and often stretched legs, due to nerve compression resulting in numbness on the surface of the foot The symptoms of nerve compression need to be removed to improve the symptoms; 4, vascular factors: mainly central vascular factors, usually the opposite side of the vascular lesions, such as stenosis, plaque and cause ischemia, hypoxia, resulting in the symptoms of numbness of the foot. Vascular lesions in the lower extremities may also show such phenomena, caused by ischemia due to stenosis, plaque, embolism, etc. in the ipsilateral artery. The clinical diagnosis needs to be clarified by vascular ultrasound, and appropriate removal of vascular embolism or endovascular treatment is given, and anticoagulant drugs are actively used to achieve improvement of symptoms.