Numbness of the middle finger during sleep may be caused by mechanical compression, carpal tunnel syndrome and cervical spondylosis. 1. Mechanical compression: It may be due to incorrect sleeping posture that the hand is compressed for a long time and localized numbness occurs. If the compression time is short, it will return to normal after a period of time after the compression is lifted. 2. Carpal Tunnel Syndrome: If the brain nerve is compressed, numbness of the middle finger and index finger may occur. After the onset of the disease, the condition can be improved through nutritional nerve therapy and localized release therapy. 3. Cervical spondylosis: when the patient’s nervous system is compressed, the symptoms of numbness of the middle finger or index finger may also occur. It is mainly caused by the pillow position being too high at night and the cervical spine being strained for a long time. Therefore, if the patient has severe or persistent symptoms of numbness of the middle finger in sleep, he should go to the hospital in time to find out the cause of the disease and get treatment as soon as possible.