I believe it could be lactose intolerance. you may not be able to digest diary products so when u eat them, you create lots of bacteria in your gut. after years of this, you'll start to smell really bad with all kinds of odors. The bacteria can cause ulcers too. For now start taking lactose enzymes and Pepcid and see your DR. for testing of Lactose and peptic ulcer. You don't have to have major symptoms to be lactose intolerance.