My 11 year old son was diagnosed at the age of 4 with IBS. He was on medication since then, however the stomach ache is getting worse. He gets stomach ache every time he eats anything, if he eats too fast or too much. He gets stomach ache accompanied by nausea, when is gets hot. He has had three very bad episodes where the stomach ache lasted up to 48 hours with vomiting and NOTHING took the pain away. He has had a gastroscopy and blood tests and barium meal etc etc etc, and the doctors can find nothing physically wrong with him. I am desperate to help him, please if anyone can offer any advice it would be much appreciated.