Hello! My brother (Caucasian male age 22) is currently sick and has been for a week now (since April 10th). He vomits and burps often. He eats little and cannot hold down what he does eat. When asked about his symptoms he says that he has been feeling tired and has little appetite, and when he tried to eat tonight (even a little), he experienced extreme gas which he could not expel by burping, and which caused him to throw up. He became sick upon arrival at his girlfriend's house for Easter, which he was going to be spending with her family. He has experienced something similar before, in which upon going on a school trip to Florida he became sick, with similar, if not exactly the same, symptoms. He became sick on the first couple days there, and was sick for a month or two afterwords, from the trip all the way through Thanksgiving, Christmas, and New Years, although it was kind of on and off. We had him checked out many times during that time, but the doctors couldn't find anything wrong. His condition is recurring, non-contagious, and very long lasting, and we are worried about him, so any help would be appreciated. Thank you!