Methylcobalamin is vitamin B12, which can promote nucleic acid production and DNA synthesis, and has a certain repairing effect on nerve cells and nerve fibers. When a lumbar disc herniates, it may damage the nerve root, causing compression and edema of the nerve root, which will lead to demyelinating changes of the nerve root. Therefore, methylcobalamin has a certain effect of repairing the nerve myelin, and can be used under the guidance of doctors for the treatment after the nerve is compressed by the herniated disc, and may have a certain nutritional effect on the repair of the nerve root.