Foamy stool is mostly a sign of indigestion, which is mainly due to the increase of food residue caused by indigestion, which is fermented and gas-producing by the bacteria in the intestines, making the stool mixed with foam. You can take oral domperidone, mosapride and other drugs to strengthen gastric power. At the same time, appropriate exercise, quit smoking and drinking, develop good eating habits, regular diet, eat more soft, easy to digest food, do not eat spicy stimulating food, eat more meals, remember to overeat, avoid eating raw, cold, hard, rough, greasy, too much fiber-containing food, do not drink strong tea, coffee, alcohol and other foods; eat less easy to produce gas food, such as potatoes, soy milk, tofu, onions and other foods.