What Could Cause Blood In Stool And A Warm Stomach Sensation After Heavy Alcohol Use And Vomiting?

hello, my boyfriend has just told me that he has been using the restroom and seen blood. his stomach has had a warm feeling as well. he has been drinking alcohol this weekend, resulting in too much and blacked out friday- vomitting everywhere. continued to even drink again the next night, resulting in no vomitting this time. any help on what he should do, besides quit drinking?