The foot numbness when squatting may be caused by the following two reasons: 1, may be squatting when the knee bending more serious, it is easy to make the back side of the knee artery or nerve, after compression of local numbness symptoms. The patient is up and moving to remove the compression, the symptoms will soon be relieved. 2, may be caused by lumbar spine disease, squatting waist must be bent forward, if the patient usually has a lumbar disc protrusion, lumbar spine slipped, lumbar spinal stenosis, bending is likely to compress the nerve roots of the lower limbs, resulting in numbness, weakness, pain and other symptoms of the lower limbs. Such conditions are accompanied by lumbar discomfort, such as lumbar pain, lumbar acidity, and restricted movement.