Patients with numb feet in the middle of the night, triggered by the following specific causes: 1, lumbar disc herniation: patients who sleep in beds too soft, too hard, easy to cause nerve root pressure in the lumbar spinal canal, resulting in numb feet symptoms in the middle of the night. 2, like to sleep on the side: if the lower extremity of one side is pressed against the lower part of the other leg for a long time, it will lead to poor blood circulation in the legs, causing nerve ischemia, hypoxia, resulting in numb feet symptoms. 3. Cold feet: sleep without attention to foot warmth, especially in winter, after the foot is cold, also easy to lead to the symptoms of numb feet in the middle of the night. After the patient appears in the middle of the night foot numbness situation, must be consulted to see what causes, for the cause of treatment, to promote the reduction of foot numbness symptoms, recovery.