The feet often numb mainly consider the following 3 aspects: 1, local distal arterial vascular pressure appears distal blood supply is insufficient, the leg vascular pressure leads to distal blood supply is insufficient, it will lead to nerve ischemia and hypoxia, temporary numbness, timely change of position so that the blood vessels can be gradually improved. 2, peripheral neuropathy is particularly common in diabetic patients, manifested as bilateral foot numbness, mainly due to prolonged abnormal blood sugar The abnormal nerve lesions caused. The tibial nerve or common peroneal nerve lesions can cause numbness in the feet, check the electromyography of the lower limbs to clarify the cause. 3, lumbar disc herniation compression nerve root, lumbar disc herniation compression nerve root, especially the lower segment of the disc herniation, will lead to numbness and weakness of the foot. Patients can show back pain with lower limb numbness and weakness, or simply lower limb numbness, and performing lumbar spine MRI can clarify the nerve compression.