The causes of hand numbness include physiological factors and disease factors. Physiological causes include localized pressure, environmental factors, etc. Disease factors include cervical spine disease, cerebrovascular disease, peripheral neuropathy and so on. 1. Physiological factors (1) Localized pressure: due to incorrect posture, the hand is compressed, local short-term ischemia and hypoxia, hand numbness symptoms can occur. (2) Environmental factors: due to the low temperature of the surrounding environment, the hand will appear numbness when stimulated by cold air, and can be recovered after timely protection against cold and warmth. 2. Disease factors (1) Cervical spondylosis: including cervical spinal stenosis, cervical disc herniation, etc., due to nerve root compression can have numbness in the hands, and at the same time, there will be neck pain. (2) Cerebrovascular disease: for example, cerebral hemorrhage, cerebral infarction, etc., when the sensory center is damaged, hand numbness can also occur. (3) peripheral neuropathy: this disease is mainly due to diabetes, drug poisoning, heavy metal poisoning, etc., the onset of peripheral nerve damage can appear hand numbness. When there is numbness of the hand, especially when it is recommended to consult the neurology department in a timely manner to improve the auxiliary examination, to clarify the cause of the disease.