Lumbar disc bulge will not compress the sciatic nerve, the bulging protrusion is relatively small and does not break through the annulus fibrosus, only to the nerve root has a certain stimulation effect, will not directly compress the nerve root, also will not compress the sciatic nerve. Unless the spinal canal itself is very narrow or the hyperplasia is more serious, so that the nerve root canal and the spinal canal are very narrow, a slight bulge will also compress the nerve root. At the same time, in addition to compression, chemical irritation of the nerve root and stimulation of inflammatory factors can also cause nerve root pain and produce symptoms of sciatica. Pain can occur even though there is no mechanical compression and requires attention. Expansion requires conservative treatment with avoidance of exertion, reduction of activity, bed rest, application of medications, and regular review.