The reason for the blood in the stool is that after the fire causes the stool to dry out, the skin around the anus is broken when the stool is forced, forming an anal fissure, so there will be blood in the stool. You should avoid eating beef, mutton and other foods that are easy to catch fire, and drink water with Chinese herbs such as honeysuckle, wild chrysanthemum, forsythia, gardenia, etc., which have the function of lowering fire. 2, you can eat laxative medicine, such as hemp pill, twice a day, once six grams, after taking it, the stool becomes soft, and after it becomes soft, it will not stimulate the perianal area and lead to anal fissure. 3. You can also use hemorrhoid ointment or anal tide ointment to apply it externally around the anus and inside the anus to promote the healing of the fissure.