The symptoms of anal pain when diarrhea occurs may be related to the following reasons: 1. Patients with diarrhea have red, swollen and painful perianal skin due to the increased number of stools, repeated stimulation of perianal skin by stools, plus repeated rubbing of perianal skin by hand towels, suggesting that the perianal skin can be flushed with warm boiled water or saline to keep the anal skin dry; 2. Patients themselves have certain anal diseases, such as perianal inflammation, anal sinusitis, etc., when diarrhea due to repeated stimulation of stool will also appear anal pain symptoms, should go to the hospital to do the relevant examination to clarify the diagnosis; 3, related to hemorrhoids, patients with hemorrhoids due to diarrhea when the stool times increase and repeated stimulation of hemorrhoids, will appear when diarrhea anal pain symptoms, diarrhea, if anal pain, need to actively treat diarrhea. It is also important to pay attention to dietary regimen and avoid spicy and irritating foods to avoid aggravating the symptoms.