Blood in the stool is considered to be bleeding caused by ruptured internal hemorrhoids. Drinking alcohol for a long time or eating a lot of stimulating food can lead to congestion and edema of the perianal mucosa and aggravate the symptoms of hemorrhoids, and the toughness of the mucosa is reduced after congestion and edema, and the dryness of the stool during defecation can easily cut the mucosa and lead to bleeding. Alcohol has the effect of vasodilatation, after drinking alcohol the perianal submucosa is dilated and congested, constipation and defecation can easily lead to bleeding from ruptured internal hemorrhoids, drinking alcohol can aggravate the symptoms of anal fissure, bleeding from anal canal skin fissures, bleeding is relatively small and there is severe pain, and the bleeding symptoms caused by rectal and anal canal tumors cannot be excluded. As tumor is rich in blood circulation, it is easy to cut and bleed when enlarging to a certain degree when defecating, and the symptoms are aggravated by vasodilatation after drinking alcohol, so defecation and bleeding should be treated in hospital as much as possible, and then treated timely according to the specific situation after diagnosis.