Toilet wiping the anus with blood has many reasons, physiological reasons such as toilet paper is hard, stool dry knot, etc., pathological reasons have benign anal and intestinal diseases and malignant diseases. 1. Physiological reasons: common causes are mainly dry stool, toilet paper is hard, etc., defecation, wipe the paper force can cause the anus at the skin mucous membrane breakage, can appear anal bleeding. Prevention of dry stool, constipation, drink more water, more exercise, develop good defecation habits, change to soft toilet paper, can avoid bleeding. 2. benign anal and intestinal diseases: common causes such as internal hemorrhoids, mixed hemorrhoids, intestinal polyps, certain intestinal inflammation, etc., can appear to wipe the anus with blood, defecation can be no obvious pain. It should be prevented from the root cause, and actively treat the original disease. At the same time, pay attention to living and eating habits, regular physical examination and observation. 3. Malignant diseases of anus and intestines: including rectal cancer, colon cancer, etc. In addition to wiping the anus with blood, there may be changes in stool traits and habits, which need to be alerted to the occurrence of tumors, and timely and comprehensive examination should be conducted to exclude hidden danger. When you find blood in the anus when you go to the toilet, you should consult the doctor in time to get a clear diagnosis, if it is a pathological cause, you should receive regular treatment in time to avoid delaying your condition.