White tofu residue in stool is mainly indigestion, which is related to intestinal tumor. When human body has indigestion, food digestion and absorption in gastrointestinal system will be affected. Food has been excreted without being fully digested, which can be accompanied by undigested food, accompanied by white tofu sludge-like material, which will induce malnutrition in the long run. Malignant tumors will affect the function of the digestive system, and celiac disease of cancerous tissue will occur in advanced stages. In the advanced stage, crusty tissues will be accompanied by fecal excretion, and white tofu residue material can be found in the stool, while pus and blood stool will appear.