If you bleed as soon as you go to the toilet, you may have internal hemorrhoids, rectal tumors or rectal fissures and other rectal and anal diseases. The bleeding is caused by fecal friction or forceful defecation, resulting in increased pressure around the anal canal, and the bleeding will stop on its own after defecation. In patients with internal hemorrhoids, bleeding inside the anus after defecation is bright red, not mixed with stool or blood on the stool, followed by dripping blood, and in severe cases, jet-like bleeding can be seen, and in a few patients with internal hemorrhoids, long-term chronic blood loss can cause anemia. Patients with anal fissure have less blood in the stool, bright red blood, blood on the stool paper or dripping blood, rarely seen jet bleeding, and accompanied by severe pain in the anus, which is burning-like or knife-like.