I've had a pain under my left rib since last July. Numerous gp visits have concluded nothing. I've had chest x ray (showed possible consolidation but clear six weeks later) abdominal scam for major organs, stomach, gallbladder, pancreas, kidneys etc all fine. Blood tests all fine but still I get this pain. It's there everyday. It doesn't double me up but more like a niggling pain like a pulled muscle. I do worry sometimes it's dime thing more sinister but I've had so many tests. Anyone experienced this? It feels different to the SI joint pain which shoots through me. I did have costochondritis in Sep but it's still here before and after that. I also have ankylosing spondylitis. X