Leg pain after lumbar disc herniation surgery is most likely due to the leg pain formed when the original lumbar disc herniation is heavy and compresses the nerve, resulting in the nerve not fully recovered. If the pain is short-lived, it is possible that the leg pain is produced after surgery because of edema of the nerve root, and usually the leg pain can be completely relieved in 5-7 days, or at most about 1 month. If the pain is long term, it is likely that the herniated lumbar disc was heavier at that time and produced nerve degeneration after compressing the nerve, and there is no way for the nerve to recover completely despite the surgery. You can take appropriate oral methylcobalamin and nutritional nerve therapy, and then observe for about six months to see if the nerve has recovered. The nature of the leg pain needs to be determined whether it is mainly soreness or tingling, so you can give your legs proper rest and avoid prolonged weight-bearing and prolonged standing and sitting.