My son (17) is super fit (boxing or gym 5 nights a week) and has a healthy diet. He apparently has had random vomiting 2-3 times a week for some time (at least a year I've just found out) - there are no other symptoms. Exercise can be a trigger but yesterday, for instance, he vomited, shortly after eating breakfast. I wasn't aware until yesterday that this had been going on for such a long time. I am fairly certain it is not bulimia as he wants to put on weight (he is 6' and 11 stone). We managed to get a drs appointment yesterday and he went for blood tests this morning but results won't be back til next week. Does anyone have any suggestions - I'm worried about him.