There are two reasons for bleeding in the stool after drinking alcohol: 1, the systemic vasodilatation caused by drinking alcohol, resulting in congestion of blood vessels, causing local rupture and bleeding, commonly seen in internal hemorrhoids, most of the bleeding is usually fresh blood stools, the amount of which is relatively large, and some of them may be in the range of 100-200 ml. 2, due to the direct stimulation of the gastrointestinal mucous membrane caused by alcohol gastrointestinal mucous membrane edema, congestion, erosion, resulting in the rupture of blood vessels, causing bleeding, bleeding will occur, usually this bleeding is a tarry black stool or dark red blood stool. Bleeding will occur in the stool, and usually the bleeding in this case is tarry black stool or dark red blood stool. Therefore, for the case of frequent bleeding from drinking, it is necessary to improve gastroscopy and enteroscopy to further clarify the diagnosis. If similar situations occur frequently, you need to actively give medicinal symptomatic treatment.