Generally speaking, bleeding from farting may be caused by hemorrhoids, acute bacillary dysentery, ulcerative colitis and so on. 1. Hemorrhoids: If fart bleeding is caused by hemorrhoids, the color of the blood is usually bright red. Hemorrhoids are usually caused by poor living and eating habits, such as prolonged squatting and sitting for a long time. Hemorrhoids are usually accompanied by blood in the stool, perianal discomfort and other symptoms. In daily life, we should pay attention to the diet should be light, and develop good habits. 2. Acute bacillary dysentery: acute bacillary dysentery is generally due to dysentery bacillus infection, there will be intestinal mucosal bleeding, the main symptoms are diarrhea, abdominal pain, bloody stools, etc., may also appear farting bleeding symptoms. 3. Ulcerative colitis: a chronic non-specific inflammatory disease of the rectum and colon whose etiology is not yet very clear, the lesions mainly involve the mucosa and submucosa of the large intestine. As the inflammation stimulates the colonic mucosa, it can lead to bleeding. In addition, farting bleeding can also be seen in other anorectal diseases and colon diseases, such as anal fissure, rectal polyps, colon polyps and so on. It is recommended that the patient go to the hospital in time, after a clear diagnosis, follow the doctor’s instructions for treatment.