Hello. My son is 11 years old. My concerns relate to his digestion . He has always been starving but when I get him food he is full before finishing. Sometimes the moment he starts eating he leaves the table to have a bowel movement . His bowel movements always take him at least 20 minutes. For the last 3 years, we have had many episodes where he starts eating, and immediately feels pain in his throat and usually vomits. His doctor told us to try miralax.....hasn t worked. Any ideas?