What diseases in the anorectal department will appear with blood in the stool? 1, hemorrhoids: internal hemorrhoids bleeding mostly without obvious pain, can be manifested as blood in the stool, blood-stained hand paper, dripping blood, spraying blood, etc. 2, rectal cancer: initially can be manifested as blood in the stool, blood is mostly dark red, accompanied by mucus and pus, mostly without obvious pain, easily misdiagnosed as hemorrhoids. 3, anal fissure: anal fissure blood in the stool is bright red, accompanied by pain in the anus during the stool, and the characteristic performance is periodic pain. 4, rectal polyps: rectal polyps often manifest as blood in the stool, prolapse. 5, other anorectal diseases: such as anal skin fissures, anal warts and so on.