The phenomenon of bubbles in the stool is mainly due to the following reasons: 1, poor diet, including unhygienic diet and the intake of a large amount of indigestible food, etc., will cause a certain impact on the digestive system, thus showing up in the bowel movement. 2, the cause of gastrointestinal diseases, including some chronic enteritis and gastric ulcer, enteritis, etc., these diseases will cause the digestive system to appear functional disorders. The reason for this is the lack of digestive power, which leads to a large amount of food residue, and the prolonged retention of feces in the intestines, eventually causing foamy stools.