Was a post operative CT scan, nerve conduction velocity study (NCV) and electromyography done?
Since you are offline, I am answering the question. This can be failed back surgery syndrome. Patients who have chronic, disabling lower back pain and other symptoms after spinal surgeries are said to have failed back surgery syndrome. Timing of recurrent symptoms provides information helpful in diagnosis.
1) Immediately after surgery, failure to achieve relief of symptoms or a continuation of preoperative symptoms are due to
a) an initial wrong diagnosis,
b) technical error,
c) poor patient selection because of psychosocial factors.
2) Temporary relief after surgery followed by pain recurrence within a few weeks of surgery suggests infection.
3) When pain occurs months after surgery, causes are
b) battered root syndrome (inflammation of the nerve root as a result of surgical manipulation),
c) epidural fibrosis,
CT scan or CT myelogram are done to ascertain the cause. The treatment entails;
1) Oral analgesics
2) Physical therapy
3) spinal cord stimulation,
4) radiofrequency neurolysis
If these measures are not effective, a revision surgery would be planned.
Please feel free for your follow up questions.