You weren't far off. IBS is Irritable Bowel Syndrome. My son is now 10 and has had episodic diarrhea since he was little. At first I thought it was apple juice that was the problem but then he started having it when there was no apple juice around. For along period of time I couldn't really connect it to anything. Now I can specifically see that anything orange is a problem. IBS can also be triggered by nerves. It's been about a year since we discovered his milk allergy and the diarrhea doesn't happen nearly as much as it used to. When I took him to a gastroentronolist to find out about the diarrhea he that it might be Lactose Intolerance or IBS. He never expected that Daniel's behavior would change and really didn't want to even touch the subject. He said that he probably had IBS and that was it. I was to talk to my Pediatrician about the rest. Since then I've kept him off milk and tried to stay away from anything orange but I want to know what the real problem is and if I can do anything else about it. I don't wan to put him through a test like was described but I don't know what else to do. Heidi L.