How long can a lumbar disc herniation compressing the sciatic nerve be good, not serious bed rest for three weeks can be good. It is necessary to pay attention to the following aspects, one, if the herniated disc compresses the nerve root more seriously, the nucleus pulposus protrudes and the nerve root has adhesions with the spinal cord, causing the nerve root adhesions ischemia more serious need surgery. Once the surgical treatment or adhesions are serious, three weeks is not a complete recovery, at least need about two months. If the condition is not severe, bed rest, oral medication and rehabilitation can significantly promote recovery. It should also be noted that sciatica is not only associated with herniated discs, but also the usual muscle adhesions that cause sciatic nerve pain. If there is a previous history of other medical problems, such as trauma or chronic diseases, recovery is also slow.