Foamy stools in the toilet are usually abnormal and may indicate the presence of indigestion, lactose intolerance, etc. It is recommended to consult a doctor in time to clarify the cause of the disease under the guidance of a professional physician. 1. Indigestion: When the body has indigestion, there is more undigested food in the intestines, which can damage the digestive system and may cause it to react with the intestinal flora to produce foam. 2. Lactose intolerance: going to the bathroom with foamy stools may also indicate the presence of lactose intolerance, the body is unable to completely break down the lactose in the ingested dairy products, resulting in diarrhea and foamy stools. Frothy stools may also be associated with chronic enteritis and intestinal flora imbalance. If the symptom of foamy stool on the toilet is not relieved or is accompanied by other symptoms, you should go to the hospital in time to see a doctor, under the guidance of a professional physician to clarify the cause, and then give targeted treatment.