The main cause of foot numbness caused by a herniated lumbar disc is the compression of the nerve by the herniated tissue, which results in ischemia and hypoxia and gradually changes in the sheath and axon of the nerve. The recovery of foot numbness due to lumbar disc herniation depends mainly on two aspects, one is whether the compression can be released and the other is whether the damage to the nerve is reversible. When the compression is released through treatment, the blood and oxygen supply to the nerve improves, and if the damage is mild and reversible, the symptoms of foot numbness will gradually disappear over time; if the condition is severe and irreversible damage occurs, i.e., the nerve is completely necrotic, then the symptoms of foot numbness will not disappear even after treatment. The symptoms of foot numbness are mainly caused by damage to the sensory nerves, which are usually more sensitive and have obvious clinical symptoms with slight damage, while the sensory nerves are more tolerant to ischemia and hypoxia, so necrosis is not easily seen. Therefore, more than 80% of the symptoms of foot numbness caused by lumbar disc herniation can be recovered after 3-6 months by releasing the compression, proper acupuncture, or applying neurotropic treatment.