Numbness of the feet may be caused by too long a period of standing on piles, lumbar disc herniation, spinal stenosis, venous thrombosis, diabetic complications and arteriosclerosis and other diseases. 1. Staking for too long: keeping the staking posture for a long time will lead to the weakening of the muscle contraction of the lower limbs and the obstruction of blood return, which will lead to poor blood circulation and cause numbness in the feet. 2. Herniated lumbar disc: Herniated lumbar disc can also cause numbness of the feet after standing on piles, due to the protruding lumbar vertebrae will compress the sciatic nerve, resulting in numbness and pain in the lower limbs. 3. Spinal stenosis: Spinal stenosis often occurs in the lumbar spinal canal, this disease will lead to bilateral or unilateral lower limb pain, widespread numbness, stiffness, weakness and other symptoms. Prolonged maintenance of the stance posture may aggravate the symptoms and lead to numbness of the feet. 4. Venous thrombosis: because when the blood vessels are compressed, the blood vessels supply part of the limb ischemia, causing numbness. 5. Complications of diabetes: peripheral nerve damage occurs in the late stage of diabetes, which is manifested as numbness of the soles of the feet after standing on piles. 6. Arteriosclerosis: people suffering from cerebral arteriosclerosis, there will be insufficient blood supply to the brain, and furthermore, it will lead to central dysfunction, which will make unilateral numbness of upper and lower limbs or half of the body, or transient headache or dizziness, numbness is more pronounced after standing on piles. Standing pile foot numbness may also be due to the lower limb nerves around the emergence of tumors and other reasons, should be timely medical examination, consult a physician’s guidance.