Numbness of the hands and feet can be due to physiological or pathologic causes. Common pathologic causes include cervical spondylosis, peripheral neuritis, cerebrovascular disease, etc. 1. Physiological reasons: for example, keeping a specific posture for a long time, incorrect sleeping position, frequent heavy labor, etc., can cause muscle damage, poor blood circulation, and then numbness in the hands and feet. 2. Cervical spondylosis: usually due to cervical spine osteophytes, cervical intervertebral disc degeneration. Cervical spondylosis can make the local blood vessels and nerve tissues in the cervical spine be compressed, thus causing numbness in the hands and feet. In addition, neck and back pain and stiffness can also occur. 3. Peripheral neuritis: usually due to infection, endocrine disorders, nutritional disorders and other reasons. It can cause the obstruction of neuronal axonal plasma flow, which in turn manifests as sensory and motor disorders in the limbs, as well as autonomic disorders, causing numbness in the hands and feet. 4. Cerebrovascular disease: cerebrovascular disease such as cerebral infarction, due to local cerebrovascular blood supply obstacles, resulting in ischemia and hypoxia of the cerebral nerves in the area, which can cause numbness of the hands and feet. There are many causes of numbness in hands and feet, it is recommended to go to regular hospitals in time, under the guidance of professional doctors for treatment.