Foamy stools with gas in the bowel are associated with gas evacuation. Pulling out foam is caused by the stimulation of various factors, resulting in increased water and gas content in the stool. It may be caused by physiological factors such as disordered diet, catching a cold, mental stress, etc. It may also be caused by pathologic factors such as intestinal flora disorders, bacterial dysentery, and enteritis. 1. Physiological factors: due to dietary disorders, smoking and drinking, catching a cold, nervousness and other physiological factors stimulate the intestinal internal environment disorders, affecting the intestinal mucosa digestion and absorption function, so that excessive water and gas accumulation in the intestinal tract, in the intestinal peristalsis, water, gas can easily be mixed with the formation of blisters or bubbles, which are then discharged with the bowel. 2. Pathological factors: intestinal flora disorders, bacillary dysentery, enteritis, ulcerative colitis, intestinal polyps, irritable bowel syndrome and intestinal cancer and other intestinal diseases, will destroy the integrity of the intestinal mucosa, affecting intestinal digestion and absorption, and even cause intestinal peristalsis to accelerate the speed of the bowel leading to the phenomenon of foam in the stool. If the patient pulls out the foam situation recurs, it is recommended to go to the hospital in time to consult, clear cause, under the guidance of the doctor for targeted treatment.