Foamy stool is commonly known as foamy stool, the main reasons for this phenomenon include the following: 1, intestinal dysfunction caused by this symptom, intestinal dysfunction is affected by a number of factors, including changes in the external environment as well as their own diet and other factors, in addition to their own low-potassium and hyponatremia and other reasons, can cause intestinal dysfunction, intestinal dysfunction can easily lead to dyspepsia and excessive food residue and other symptoms. Some anal and intestinal diseases can easily cause the appearance of foamy stool symptoms, including colitis and rectal polyps and other diseases, which can cause the phenomenon of foamy stool or even deformation of the stool, and we need to be especially alert to the fact that some malignant tumors in the intestinal tract can cause the appearance of pus stool or foamy stool symptoms. 3, poor diet, excessive spicy and raw and cold food, which can also cause this symptom. Foods that are too spicy, raw or cold are also prone to cause this symptom.