If a patient would like to find out whether he/she has a herniated disc, the first thing to do is to consult a primary care doctor. A patient might be diagnosed with a herniated disc if a low back pain is accompanied by a radiating leg pain.
The doctor is likely to ask the patient to do the “straight leg raise test.” Here, a patient lies down and lifts one leg straight up. If there is a herniated disc which affects a nerve, that movement will boost the compression and cause pain along the leg. The doctor also questions the patient about slow reflexes, numbness, and weakness.
The doctor asks the patient to undergo some imaging studies.
A common recommendation is to perform an imaging test before treatment. The purpose of this is to exclude any other possible reasons for fractures, tumors, infection, cauda equina syndrome, and other symptoms.
MRI is the most trustworthy tool to reveal a herniated disc.
- MRI (magnetic resonance imaging) accurately analyzes the lumbar spine area, spots a herniation site and the affected nerves.
- CT (computed tomography) scan can substitute an MRI when the latter is not possible for some reasons. However, this method does not predict the future effect of treatment.
- X-rays are helpful in diagnosing such problems as a broken bone, bone abnormalities, infection, tumor, or problems with the alignment of the spine. A herniated disc cannot be diagnosed with X rays only.
- Electromyography (EMG) can highlight the compressed nerve.