My boyfriend is 46. Muscular build, good health nonsmoker, nondrinker. On the phone today he mentioned he has the taste of blood in his mouth and just went to the bathroom and lost "about a pint" of blood from his anus. He is waiting to hear back from his doctor. Had a colonoscopy less than a year ago that was good. He is a Firefighter/Paramedic. He usually goes to the bathroom once a day. Many things seem to upset his stomach, and he gets heartburn frequently. He just drinks milk, doesn't like to take antacids. I think he may be lactose intolerant as usually drinking milk or eating ice cream makes it hard to breath or wheezy and he spits alot after. Any ideas?