Symptoms of a bleeding Peptic ulcer?

My daughter in law has a peptic ulcer. She has always been slender but, she is now down to 92 lbs, she is 34 years young. She is very petit build. But she looks ill to me. The veins in her arms stick out , she looks like she has no muscle mass . She says she bleeds from the rectum. She says she quit taking her medication because of financial reasons. ( I would have bought it for her). She smokes and drinks. She also has a tendency to stretch the truth. So I do not know weather to believe her about all the bleeding. But I do know what I see. How serious could her condition be ? I am very concerned about her.