Sometimes complications do not show up until after surgery. Some show up quickly, and some may take months to become evident.
Infection
Any surgical operation has a small risk of infection. Infection can occur in the skin incision, inside the disc, or in the spinal canal around the nerves. If an infection occurs that involves the skin incision, you may only need antibiotics. If the infection involves the spinal canal or the disc area, a second operation may be required to drain the infection. Antibiotics will also be required after the second operation to treat the infection.
Re-herniation
There is always the chance (about 10-15 percent) that the same disc may herniate again. If a re-herniation occurs, usually it is during the first six weeks after surgery. But it can happen anytime and may require a second operation.
Persistent Pain
Sometimes a procedure doesn’t completely eliminate the pain. Pain may persist for many reasons. The nerves may be damaged by the pressure from the disc herniation and not recover completely. Scar tissue may develop around the nerves weeks after the operation and cause pain similar to what you had before the operation.
Degenerative Disc Disease
Any injury to a disc can lead to degeneration of the spinal segment involved. A disc that has been operated on-and a portion removed-has definitely been injured. It is not certain that a patient will develop additional problems in the area where a disc has been removed, but there is an increased chance. A second operation might be needed if pain from the degenerative process becomes severe. It usually takes several years to develop degenerative disc disease.