It sounds like your friend has cirrhosis from alcohol abuse. Internal bleeding is a common complication of cirrhosis. Everyone that has cirrhosis runs a high risk of internal bleeding due to unwanted veins that form called varices.
With cirrhosis, blood flow through the main portal vein leading to the liver slows down. Blood from the intestines and spleen backs up into blood vessels in the stomach and esophagus. These unwanted blood vessels become enlarged because they are not meant to carry this much blood. The enlarged blood vessels, called varices, have thin walls and carry high pressure. They can leak and even burst which can be a serious internal bleeding problem that needs immediate medical attention.
There is a procedure called banding that can be done to get rid of these unwanted veins. It's a simple procedure in which they do an endoscopy to find these veins, and then they tie what looks like little rubber bands around them. In a few days, the varice will just die and fall off along with the rubber band. Then it is all digested just like food through the stomach. This is done as an outpatient procedure.
I had cirrhosis and had this banding done to me a number of times. My doctors insisted I get checked every 3 months at first to get mine banded if needed. This was done through endoscopy. After they got the initial ones banded, then my exams went to every 6 months until I received a liver transplant. Doing this takes away the risk of any internal bleeding very much. It's better to do it this way instead of suddenly hemorrhaging internally.
Sometimes it's tricky to find out where the bleeding can be coming from. I'm not saying this is the problem with your friend, but suggesting it could be. As far as your friend hallucinating, that could be from the loss of blood. But cirrhosis also can cause a person to hallucinate when they get something called encephalopathy. With cirrhosis, the body is not able to get rid of ammonia like it should. This can cause a build up of ammonia which can cause a person to be confused, hallucinate, or even become violent and just not themselves. Lactulose helps get rid of ammonia. Anyone with cirrhosis usually has to take this medication for high ammonia. It needs treated when it happens because if left untreated, it can lead to coma.
Yes, your friend can be treated for his bleeding and survive. They will have to find the source and fix it. Yes, it can be fixed once they find it. People with cirrhosis usually go through multiple hospital visits with various problems that present themselves as the disease progresses. In the early stages of cirrhosis, if the person stops drinking, they can get well again even though the liver damage will be permanent. A person can function quite well as long as the liver is not damaged too much. If the disease progresses to the later stage, then nothing will stop its progression and only a liver transplant will save your life. Hope this helps you some.
I had cirrhosis and a liver transplant.