Other causes of vomiting
are diseases affecting extrinsic and
intrinsic neural control of gut motility and
visceral smooth muscle. You will need evaluation at special centers with
facilities for gastrointestinal manometry, gastric emptying studies, other electrophysiologic studies, and, in a few patients laparotomy with
examination of full-thickness biopsy specimens of the small intestine may be needed. It is best to seek second opinion and consult an experienced gastroenterologist.