There are two reasons for this situation, the first is the diet of the previous day too much spicy and stimulating food, the second variety of circumstances exist in the anal fissure. The first situation is because of the previous day’s diet too much spicy and stimulating food, the active ingredient of chili pepper is capsaicin, capsaicin can not be thoroughly digested in the intestine, so the next day will be discharged with the stool, in the passage of the anus, stimulate the mucous membrane and skin around the anus, produce hot and spicy pain. In this case, you can apply hemorrhoid cream externally for 2-3 times to relieve the fiery pain well. If you cannot tolerate this pain, eat less spicy and irritating food in the future. The second situation is anal fissure, anal fissure is because of the dry stool, tearing the skin of the anus, causing spasm of the anal sphincter muscle, when defecating, it will produce knife-like pain. This pain is paroxysmal and often lasts for several minutes or hours before it can be relieved, often with a small amount of blood in the stool. This condition needs to be treated as soon as possible as it is quite painful.