The causes of froth in the stool to be considered are indigestion, cold in the abdomen and other diseases. When indigestion occurs, especially when lactose intolerance occurs, because the nutrients consumed such as lactose cannot be digested and absorbed in the small intestine, sugar can be decomposed by bacteria such as Escherichia coli after entering the large intestine, producing gas and mixing with the intestinal contents, more foam will appear. When the abdomen is cold, the intestine will peristaltically accelerate because of cold stimulation, which will affect the absorption of nutrients and intestinal gas. The nutrients and gases that are not absorbed can produce more foam under the effect of rapid peristalsis of the intestines. You can first drink hot water, do abdominal warmth, see if it can improve, can not effectively improve the need to do routine stool examination, colonoscopy, if it is indigestion, you can try lactase raw and other probiotic treatment.