The purpose of the . Test is to find the source of your pain by recreating it over the same location with the same quality as the disc is injected. If it is a normal disc you will feel pressure. If a disc that is somewhat abnormal , maybe an ache but a disc or discs that are the source of your pain should be an exact reproduction temporarily. This is done under local anesthesia with occ. Use of some sedation.
Discogram. Unpleasant but they can make you comfortable usually not as bad as your worst back pain it is normal to be sorer for a few days after the procedure i always took this to mean we found the pain generator necessary step prior to considering surgery to treat back ache confirming the discogenic pain generator parmount importance . This diagnostic tool improved surgical sucess rates 25%.For fusions.