When the baby coughs with phlegm, it is mainly seen in the respiratory tract with pathogen invasion, inflammatory reaction occurs, and there is a large amount of inflammatory secretion oozing out. At this time, we should avoid eating spicy and stimulating, too cold or too hot food, and do not eat relatively dry, lack of moisture food, do not eat sweets, such as chili peppers, scallions, fennel beans, onions, coriander, as well as cookies, cakes, cream, ice cream, a variety of sweets, durian, mango, popcorn, and fried melon seeds, fried peanuts, fried french fries, fried chicken, and so on. You should eat light, soft, runny food mainly.