first you have to understand what was going on prior to you having surgery: a nerve was pinched and gets very irritated and inflamed which causes pain. You have surgery, which removes what was pinching your nerve and causing the irritation and subsequent inflammation. however, the nerve is still irritated and inflamed after surgery and needs time to heal. Sometimes this happens quickly and some times not so quick and could require a steroid injection to take the inflammation away from it and stop the pain.
Second, you need to see if you had a secondary problem superimposed on the the primary problem. Most common is a sacroiliac joint that gets inflamed on the same side as the side of the pinched nerve and over time, the pain to the patient feels the same. You have the surgery to remove what is pinching the nerve, but the pain persists. This is the pain from the sacroiliac joint. The sacroiliac joint is called “the great mascarader”. And, unless you treat the sacroiliac joint after your surgery, you’ll continue to have this pain that feels as if it is the same pain prior to surgery and is confused with the pinched nerve you had.
It will feel as if the surgery did not help at all.
I hope this was helpful.