My son is almost 4 years old has complained of abdominal pain for 2 years. He has loose stools most of the time. He has a bowel movement every other day. We found out that he could not tolerate regular formula as a baby as well as regular milk now he does drink soymilk. In the past he has been hospitalized for these same problems along with vomiting bile and testing positive for blood in his stools. His regular doctor has done blood cultures, ultrasound of his abdomen as well as other blood test and cultures which came back negative. I am getting frustrated and more concerned.