Most of the reasons for increased stool frequency after chemotherapy are due to drug irritation of the mucous membrane of the gastrointestinal tract, intestinal infections, and improper diet. Chemotherapy is a method of treating cancer, which means the drugs enter the body through oral or intravenous methods to kill cancer cells. 1. Drugs stimulate intestinal mucosa: common chemotherapeutic drugs include cisplatin, irinotecan and other drugs, and these chemotherapeutic drugs themselves can cause gastrointestinal side effects such as diarrhea and abdominal pain. 2. Intestinal infections: the side effects of chemotherapy myelosuppression may cause a decrease in white blood cells, which can lead to infectious diarrhea. This is because the body’s immunity decreases and the gastrointestinal tract becomes infected, leading to a significant increase in the number of bowel movements. 3. Improper diet: some patients have increased stools after chemotherapy because of indigestive diarrhea caused by improper diet. This is because the digestive function of the gastrointestinal tract will decline after chemotherapy, if you eat some greasy, stimulating or indigestible food during this period, it is easy to cause indigestion, which will lead to an increase in the number of bowel movements. The exact cause of the increase in the number of bowel movements needs to be clarified with the help of a doctor, and it is recommended to consult a doctor in time.