This requires removing a small portion of the bone over the nerve root as the aim of the decompression surgery is to relieve from the nerve root pinching. The pressure that leads to this kind of pain (known as radiculopathy or sciatica) can be attributed to nerve root pressure that can be traced to a lumbar herniated disc or lumbar spinal stenosis. Microdiscectomy and laminectomy are two decompression surgery that are usually performed.