Seven-month-old baby’s bad breath is caused by indigestion, children’s age is relatively young, especially seven-month-old baby’s spleen and stomach is more weak, it will cause weak digestive ability, after giving children to eat supplementary food or drink too much milk is very easy to cause children’s indigestion, children’s indigestion will occur after the occurrence of bad breath and thick and greasy tongue, and may even cause abdominal pain, undigested milk flaps in the stool and other symptoms. In this case, children can be treated with pepsin or Wang’s Pao Chi Pills and Bao He Pills, both of which can help improve children’s bad breath by eliminating food and resolving stagnation.