Please help-health crisis!!?

My grandfather had surgery about a month ago for a ruptured ulcer. He has been in and out of the hospital for the past 2 months. He went back in a week ago because he was bleeding from his temporary feeding tube and also bleeding from his rectum. The doctors found another mive ulcer in his stomach that was causing the bleeding, but said they couldn't operate, so they gave him medicine. He was supposed to go home tomorrow, but he just started coughing up large amounts of blood about an hour ago, and the doctors won't tell us what is wrong with him. Can anyone help my family figure out what is causing all of this? Thank you!