Numbness of the hand at night may be due to peripheral nerve injury caused by sleeping on the side, one side of the hand for a long time under pressure resulting in damage to the nerves of the hand. There are also some patients because of cervical spine problems, long-term sedentary work or long-term lying down to watch TV, resulting in cervical disc herniation, compression of the nerve, resulting in hand numbness. In addition, diabetic patients with peripheral neuropathy can also experience numbness in their hands. There are also rare causes of hand numbness, such as inflammatory radiculopathy in multiple hands, which can also cause Guillain-Barré syndrome. Regardless of the cause, if the symptoms are persistent and cannot be relieved on their own, accompanied by muscle weakness in the hands, which affects life and work, it is best to go to a specialized neurological examination to find out the cause of hand numbness, so that a better targeted treatment can be carried out.