The causes of numbness in the hands and feet of patients are mainly considered as follows: 1. If there is sudden numbness in one side of the hands and feet, consider cerebrovascular disease, such as transient ischemic attack, cerebral infarction, cerebral hemorrhage. 2. 3. If the patient has numbness at the end of hands and feet, it is considered to be caused by peripheral neuritis, and the numbness at the end of hands and feet will show glove-like changes. This condition may be caused by diabetic peripheral neuropathy, or it may be caused by a lack of B vitamins in the body due to long-term alcohol consumption, or it may be caused by damage to the peripheral nerves due to exposure to chemicals, which can be clarified by an electromyography.