Numbness of the feet and hands may be caused by physiological factors, such as compression during sleep, or it may be caused by pathological factors, such as diabetic peripheral neuropathy, cervical spine, lumbar disc herniation. 1. physiological factors: sleeping due to incorrect position, hands and feet for a long time by the pressure, may lead to poor blood circulation of the nerve endings, triggering the phenomenon of numbness in the hands and feet. 2. Diabetic peripheral neuropathy: diabetic patients have unstable blood glucose levels, if the blood glucose level is in a long-term high state, it may lead to peripheral nerve lesions, causing numbness in the hands and feet. 3. Cervical spine and lumbar disc herniation: lesions in the cervical spine and lumbar spine, trauma and other injuries can lead to cervical spine and lumbar disc herniation, resulting in localized nerve root compression and numbness of the limbs, lumbar pain, neck and shoulder pain, etc., but usually not numbness of the hands and feet at the same time. Numbness of the feet and hands of patients in the exclusion of physiological factors, it is recommended to go to the hospital to check the cause of the disease, a clear diagnosis, under the guidance of the doctor according to the specific conditions of the appropriate treatment.