Blood in the stool on fire may be caused by anal fissure, hemorrhoids, rectal tumor and other reasons. 1. anal fissure: the cause of the blood is because after the fire led to dry stools, hard to defecate broke the skin around the anus, the formation of anal fissure, so there will be the phenomenon of blood, you can follow the doctor’s instructions to take non-steroidal anti-inflammatory drugs such as diclofenac sodium and other oral pain treatment, at the same time you can use such as hemp soft capsule and other medications to soften the stools, the anal fissure of the symptom under control, the phenomenon of the blood may gradually disappear. 2. hemorrhoids: hemorrhoid patients in the fire may be formed on the hemorrhoidal surface stimulation, resulting in hemorrhoidal vein rupture bleeding, blood attached to the surface of the fecal matter, may form the phenomenon of blood in the stool, can be used externally hemorrhoidal suppositories, and other drugs for treatment, if the hemorrhoids are more serious, you can also consider the use of surgical methods for treatment. 3. Rectal tumors: blood in the stool when on fire may also be due to rectal tumors, tumors in the intestines may rupture when squeezed by feces, and the blood flowing out may form blood in the stool when it adheres to the feces, and the patient should go to the hospital for tumor screening, and then carry out symptomatic treatments under the direction of the doctor after the confirmation of the diagnosis. Patients should pay attention to a light diet, try not to eat spicy and stimulating food, drink more water, if the blood in stool still exists or even aggravated after a period of time, they should consult a doctor in time.