<s>[INST] I am 20 years old, and my doctor said that my GI dr will want an endoscopy and colonoscopy because my stomach pains have been unexplained by a CT scan, Abdominal US, and Pelvic all being normal. Is this normal? What if those tests come back normal too? [/INST] Hello! Welcome to HCM.Yes, it is quite possible that scopies also give normal result.Many such patients come to my clinic to whom I advise tests to rule out lactose intolerance, gluten sensitivity, coeliac disease, parasitic infestations & small intestinal bacterial overgrowth.If all are negative then its irritable bowel syndrome, unlikely at your age.Treatment is done accordingly.Hope this information is useful to you.Wish you healthy life.Thanks.Regards. </s>