Numbness of the legs at night can be seen in normal people, but also may be caused by lumbar disc herniation, varicose veins of the lower extremities, etc., patients should consult a doctor in a timely manner to clarify the cause of the disease after treatment. 1. Physiological conditions: normal people in the night without a good blanket or long-term in a position, because of the cold, pressure leads to reduced blood supply to the legs appear numb, such people should pay attention to the moderation of exercise, less alcohol, maintain a regular routine. 2. Lumbar intervertebral disc herniation: degenerative lumbar spine lesions caused by the nucleus pulposus of the intervertebral disc protrusion compression and irritation of the nerve root and other surrounding tissues, the patient will have lumbar pain, leg pain, numbness of the legs, etc., the night time people’s senses are more sensitive, the symptom will be more serious at night, this group of people can be localized physical therapy and massage. 3. Varicose veins of the lower limbs: the backflow of blood in the veins caused by superficial venous valve dysfunction in the lower limbs, patients will have pain, numbness, localized ulcers, pain and numbness are more pronounced at night, such people should wear compression stockings, and if necessary, surgery. There are many causes of leg numbness, it is recommended to go to the hospital in time if the symptoms cannot be relieved, and all the above medicines and treatments should be carried out under the guidance of the doctor.