If the numbness is on one side of the hands and feet, with previous hypertension, diabetes and other underlying diseases, it is likely to be related to acute cerebrovascular disease, and needs to improve the cranial CT or magnetic resonance examination to clarify the diagnosis. If the numbness of the hands and feet is bilateral, it is likely to be related to polyneuropathy, the causes of polyneuropathy are mainly the following: 1, poisoning, such as some drugs. 2, nutritional disorders, such as B vitamin deficiency, chronic alcoholism. 3, metabolic disorders, the most common is the peripheral neuropathy of diabetes. 4, may also be related to infection, autoimmune diseases, etc. 5, in the clinical There are other rare manifestations that can also lead to numbness in the hands and feet, such as cervical spondylosis or lumbar spondylosis, and other bone and joint diseases, but cervical spondylosis or lumbar spondylosis is often the main manifestation of numbness in the upper and lower extremities alone, and rarely appears at the same time numbness in the hands and feet. 6, severe anemia can also cause numbness in the hands and feet.