I saw a GI doc today about the possibility of Gluten being the cause of my PN. I had an endoscopy a several years ago due to gastro reflux. Now I get to have another one to rule out celiac as well as to see how my stomach is doing. This will rule out gluten and both the doc and I thought it might be a good idea to determine the health of my stomach in case I end up on stronger meds for pain down the road.