The increase in stool frequency after chemotherapy may be due to the fact that chemotherapy can damage the mucous membrane of the intestines, thus causing the mucous membrane of the intestines to produce excessive secretions, which may lead to an increase in the frequency of stools. There is also the possibility that chemotherapy may lead to the occurrence of intestinal ulcers, which may also cause an increase in the number of bowel movements. Therefore, if there is an increase in the number of bowel movements, you can eat more easy-to-digest foods and less fat- and protein-rich foods, which are not conducive to the recovery of the intestinal mucosa. After 1-2 weeks, the increased frequency of bowel movements often recovers gradually. However, if severe diarrhea develops, antidiarrheal and symptomatic treatment is needed.