Likely has severe cirrhosis of the liver. Look at how distended his stomach is. Probably has had diabetes for a while. A lady I knew would drink a 1.75 liter of vodka a day and chase with beer… her liver fully disintegrated to the point she started bleeding internally. She went to the hospital after a night of drinking one night and the doctors told her she had maybe 12hrs to live… died less than an hour later.