Pain in the anus after a bowel movement is a very common phenomenon in daily life, mainly caused by constipation, hemorrhoids, anal fissures and other factors. Many people have had constipation, of course, the taste of constipation is not pleasant, so how to relieve the pain caused by constipation? 1, the diet should not be too fine and partial food. Habitual constipation is mostly related to the diet is too fine and partiality. Food is too fine. Eat more vegetable fiber is bound to be less, the intestinal tube of food residues on the intestinal wall stimulation is bound to be weak, not enough to stimulate the defecation reflex and cause constipation. 2, to develop a daily habit of drinking yogurt. Yogurt can supplement probiotics and regulate the harmful bacteria in the intestinal tract. And yogurt also has a mild diarrhea-causing effect, which can fight constipation. Therefore, you should drink a certain amount of yogurt daily. 3. The diet should not be too light. In order to prevent and control the elevation of blood lipids, many people have a preference for lighter foods. This often leads people into a misunderstanding, excessive diet light and less oil over time, but also because of the lack of fat residue in the intestinal tract moisten and defecation difficulties. So these patients should pay attention to the diet is not too light. 4, supplement B vitamins, especially vitamin B1. Vitamin B1 has a facilitating effect on the digestion, absorption and excretion of food. The most abundant source of B1 is sunflower seeds, peanut kernels, soybeans, lean pork; followed by whole grains with skin, such as coarse grains, whole wheat flour, millet, corn, etc. 5, oligosaccharides have a health value. Like dietary fiber, oligosaccharides are difficult to be absorbed by the body itself, but can be used as nutrients by the beneficial bacteria that colonize the intestinal tract, these beneficial bacteria decompose dietary fiber to produce a large number of short-chain fatty acids and other acids can not only reduce the pH of the intestinal tract, inhibit the growth of harmful bacteria, thereby limiting the accumulation of decaying substances in the intestinal tract, play a role in regulating the gastrointestinal. Food sources: Soybeans (including soybeans, green beans, black beans, etc.) are the cheapest and best source of oligosaccharides. It is recommended to eat one or two soybeans or corresponding soy products daily.