burning sensation in inguinal area, on stretch a pop, sitting upright aggravates, Wikipedia reference-linkMRI scan area clean, Wikipedia reference-linkfacet joint injections no results. Hernia results so far negative. This what I understand to be the facts.
Why did you let the facet joints be injected?
injections for nerve blocks so far no results? What made you think this was the cause?
I would like to know; History of back problems? now or prior to first symptoms? Do other things aside of sitting upright aggravate the symptoms? Has your hip been checked? Has anyone suggested a bursitis? Or an active triggerpoint? Or a labrial tear?
I need to know more before I can speculate on your problem.