I struggled for a few years with extreem stomach pains...I ended going to a gastroenterologist and then ongoing tests for about another year to two years....finally they diagnosed me with gastroparesis and colitis. Both a direct result of prolonged, extensive abusue of anorexia. And yes it is very painful, extreme nausea, non self induced vomiting after meals because the food digests so slowly in your gut or takes so long to dump from your esphogus.I wish you the best of luck.