Numbness at night may be caused by physiological factors, cervical spondylosis and lumbar spondylosis, diabetic peripheral neuropathy, acute cerebrovascular lesions and other factors. 1. Physiological factors: for example, sleeping in an incorrect position at night and keeping a position for too long may lead to numbness of the limbs, which may cause numbness and awakening, and the limbs should be reasonably active and the sleeping position should be improved, which will be able to return to normal on its own. 2. Cervical spondylosis and lumbar spondylosis: for example, neurogenic cervical spondylosis, spinal cord cervical spondylosis, lumbar intervertebral disc herniation, etc., in the night sleep pillow is too high or sleeping posture is not correct, resulting in cervical or lumbar spondylosis aggravation, causing numbness of the hands and feet, etc., and then wake up numb, which may be accompanied by upper limb radiating pain, lower limb radiating pain and other symptoms. 3. Diabetic peripheral neuropathy: diabetes mellitus has a longer period of time, blood glucose repeatedly increased, may induce peripheral neuropathy, in the night sleep, may appear foot numbness hand numbness and other abnormal manifestations, will be awakened by numbness. 4. Acute cerebrovascular lesions: for example, acute cerebral infarction or acute cerebral hemorrhage, a sudden attack in the night sleep, can cause numbness of the limbs, may also be accompanied by movement disorders, speech disorders, headache, dizziness and other symptoms. After excluding physiological factors, it is recommended to consult a doctor in time to avoid serious complications caused by untimely treatment.