The occurrence of occasional blood in the stool once can be considered for the following reasons: i. It may be a mixed hemorrhoid nucleus ulcerated and bleeding, resulting in the symptoms of blood in the stool. Second, eat spicy and irritating food to stimulate the intestinal tract, and the intestinal tract is sensitive to moisture and heat, there is intestinal bleeding resulting in blood in the stool symptoms, accompanied by frequent urination, urinary tract infection problems such as urinary urgency, consider urinary tract infection or stones caused by bloody stools, you need to go to the hospital to check urinary routine and ultrasound. Occasional blood in the stool may be caused by fire and dry stool, resulting in a break in the anal mucosa. Third, it may not be blood in stool, but eating food containing too much red or darker color pigment, resulting in stool close to red in color, thus mistaking it for blood in stool, and the symptoms will not appear again after excretion. There are many reasons for blood in the stool, it is best to go to the hospital for a detailed examination to find the cause before treatment.