People wake up at night and find numbness in the hands and feet, may correspond to more reasons, generally need to prioritize whether due to incorrect sleep posture so that the body pressure, resulting in poor blood circulation in the limbs, so that numbness in the hands and feet, or pillow is not suitable, may lead to the cervical vertebrae compression of the nerve root, which leads to numbness in the hands and feet of the symptom, generally after the activity can be fully restored. In addition, it is also common in multiple peripheral neuritis, transient ischemic attack, cervical spondylosis, lumbar disc herniation, can be differential diagnosis by the doctor: 1, multiple peripheral neuritis: there are multiple peripheral nerve damage, manifested as distal sensory impairment of the limbs, coupled with the process of sleep may be localized pressure, which may cause numbness in the hands and feet; 2, transient ischemic attack: if the blood vessels appear to be transiently Occlusion, may affect the brain and even the whole body blood supply, when the hands and feet do not get enough blood nutrition, there may be numbness in the hands and feet; 3, cervical spondylosis: due to cervical intervertebral discs and their accessory structures degenerative changes, secondary intervertebral joints degenerative changes and stimulation or compression of the spinal cord, nerves, and then the symptoms of numbness in the hands and feet; 4, lumbar intervertebral disc herniation: due to the protruding nucleus pulposus stimulate or compress 4, lumbar disc herniation: due to the herniated nucleus pulposus stimulating or compressing the nerve root, cauda equina, and then the symptoms of numbness in hands and feet.