Anal pain due to diarrhea first requires relief of diarrhea symptoms and then further anal decongestion (elimination of swelling and pain). Treating diarrhea symptoms requires finding the cause of the diarrhea and treating the symptoms. If the cause of diarrhea is bacterial, fungal, viral, parasitic, or food poisoning, anti-infective medications such as Flavoxate or quinolones can be used as prescribed by your doctor. Note that the use of antibiotics is limited to diarrhea caused by bacterial or fungal infections. Other causes of diarrhea, you can follow the doctor’s instructions to take some medicinal charcoal, montelukast and so on, this kind of drugs orally attached to the intestinal wall, slowing down intestinal peristalsis, through the adsorption effect to reduce the harmful substances on the intestinal wall of the stimulation of the protection of intestinal mucosa to achieve the effect of stopping diarrhea. If chronic diarrhea is caused by gastrointestinal or other diseases, it is necessary to treat the primary disease, please seek medical treatment as soon as possible to seek standardized treatment. Anal pain caused by diarrhea may also be due to the presence of more bacteria in the stool, which repeatedly irritates the anus and causes pain. Frequent wiping of the anus and repeated irritation of the anus can also lead to symptoms of anal pain. So it is recommended to wipe the anus with a wet paper towel after diarrhea, pay attention to the action to be gentle, or use water to clean the anus, after which you can use some drugs to reduce swelling and relieve pain, such as hemorrhoid cream or erythromycin ointment. In addition, in the diet need to prohibit spicy greasy, pay attention to light diet. It is recommended to use under the guidance of a physician or pharmacist.