Horrible burning pain under rib cage

Do you suffer from anxiety? I have somewhat similar pains and that's what has started causing my pain. I took all kinds of tests and all normal 

Yes, I get this very often. It feels like a stitch either under my left or right rib cage. It comes and goes. Mine has been going on for about 8 months. Doctor's have no answers. I do suffer from chronic, sometimes severe constipation, and unfortunately have to strain alot, there are alot of times I also have diarrhea. This can be very hard on the body because our lowest ribs are "floating ribs" and are very vulnerable to muscle strain and fractures especially if straining to have a bowel movement. The muscles under our rib cages can spasm and get sore and feels like a stitch. Sometimes I apply a heating pad, or take a hot bath which seems to help a little. I asked my Doctor that sometimes I feel a lump and ask if it's a hernia and she said it's muscle strain or maybe a fractured floating rib. We don't usually get hernias under our rib cage. Not much they can do for fractured ribs. I am 2 years overdue for Colonoscopy, but am overwhelmed with Medical bills, and can't afford it right now. I am on SSDI. You can ask your Doctor for a barium enema test or ultrasound to rule anything out. Try to stay away from painkillers because they are very constipating.

You could be reacting to your thyroid medication. In view of the pain you are in, I would go straight to A&E rather than go through 111 which is not always reliable.

Something you may want to consider is to be tested for Celiac disease/gluten sensitivity.  Sometimes these symptoms can be related to a food sensitvity or autoimmune disease.  I would ask to have your HLA-DQ2 and HLA-DQ8 levels drawn and assess if these levels may be elevated. A gastroenterologist that specializes in these cases along with a very skilled registered dietitian in this area of nutrition is important to see and seek advise if there is issues in this area.