Decompression surgery is the surgical procedure to treat compression of the nerves in the lower spine or the lumbar area. When a patient presents with compression of the lumbar nerves due to herniated disc or sciatica, spinal stenosis, metastatic spinal cord compression, or spinal injuries, the doctor may recommend decompression surgery. The doctor may choose from one of three kinds of decompression surgeries – Laminectomy, Discectomy, or Spinal Fusion. Imaging tests such as X-Ray or MRI (magnetic resonance imaging) are done before the surgery. In this surgery, a portion of the bone from the vertebrae or the herniated disc may be removed. In some cases, two or more sections of the vertebrae may be joined by a graft to relieve the stress or the compression on the nerves.