The following reasons are common for numbness in the feet: 1. Consider lumbar disc herniation, when the herniated disc tissue compresses the spinal nerve roots, numbness in the feet will occur, especially when the sacral nerve roots are compressed, abnormal skin sensation and numbness in the palms of the feet, heels and outer ankles can occur. 2. Consider spinal stenosis, the typical symptom of lumbar spinal stenosis is intermittent claudication, and every time you walk a certain distance, there will be radioactive pain and numbness in the lower limbs. The patient is usually unable to walk and needs to rest for a few moments before he can continue walking. 3. Consider ankle canal syndrome, which is mainly caused by the compression of the tibial nerve at the ankle canal, causing abnormal skin sensation in the area innervated by the tibial nerve, and the tibial nerve branches at the sole of the foot as the medial and lateral plantar nerves, which can cause numbness at the bottom of the forefoot.