There are many reasons for bleeding in the stool the day after drinking alcohol, the first, more common is the bleeding caused by mixed hemorrhoids, especially internal hemorrhoids, if there are previous hemorrhoids, hemorrhoids are varicose vein mass, after drinking a lot of alcohol will stimulate the hemorrhoid vein wall varicose, which leads to hemorrhoid vein stasis, swelling, rupture and cause bleeding, bleeding is usually bright red, blood does not mix with feces. This is the case that you should go to the anorectal department in time to see the enlarged hemorrhoid nucleus, which can be clearly seen by rectal examination and placement of anoscope. The second, the second day after drinking stool bleeding, the common cause may also be enteritis, such as after drinking a lot of alcohol will stimulate the intestinal tract, resulting in local inflammatory infection, pus and blood in the stool, should promptly perform colonoscopy to clarify the diagnosis. The third, the second day after drinking stool bleeding may be rectal polyps or rectal adenoma, you can perform rectal finger diagnosis, if necessary, placed anoscopy to clarify the diagnosis.