is he drinking a lot of coffee? perhaps that's causing the brown color? bright blood means either a broken blood vessel in the esophagus or a bleeding ulcer in the stomach. that last can be life threatening. he needs to go to a doctor or possibly the er. once stomach acid eats through the lining of the stomach and you start getting bleeding you run the risk of opening a larger blood vessel and bleeding to death. so when he wriggles about it tell him you aren't willing to see him risk his life and get him some help if at all possible.
what causes bright blood and a dark brown vomit? my father in law is a severe alcoholic and tried to stop cold turkey. he is going on day 2 without alcohol and cigarettes and has vomited at least 18 times either bright blood or a very dark brown. he refuses to go to the dr so any help would be great thanks for your help