Diarrhea with foam, consider the following causes: First, intestinal infections, such as viral enteritis, bacterial dysentery, patients with rapid intestinal motility, unformed stool, and infection after the production of more gas, prone to diarrhea accompanied by most foam. Second, irritable bowel syndrome, intestinal dysfunction will also cause increased intestinal peristalsis. Third, improper diet, eating too much cold and spicy stimulating food, will also appear abnormal bowel movements and exhaust. Fourth, steatorrhea, when eating a lot of high-fat food steatorrhea, there will be foamy stools, even with oil drops. When the above situation occurs, go to the hospital for relevant examinations, such as stool routine, blood routine, and if necessary, colonoscopy. Exclude infectious factors and give montelukast and ginseng and baijiao to relieve symptoms. If bacterial infection is present, give oral doses such as haloperidol and flavopiridol. Avoid the intake of spicy, cold and other stimulating foods in daily life and give a light, easily digestible liquid or semi-liquid diet.