The baby has bad breath and food accumulation can be improved by correcting improper diet, strengthening oral care, medication and so on. 1. Correct improper diet: most of the children’s bad breath and food accumulation is related to improper diet, because of its poor resistance, and gastrointestinal function development is not perfect. If eating spicy, greasy and other indigestible food, easy to bad breath accumulation of food. In this case, we need to correct the bad eating habits, to light weekdays, in order to improve the purpose of food accumulation. 2. Strengthen oral care: pediatric halitosis may also be caused by poor oral hygiene care. It is recommended to strengthen oral care, maintain oral hygiene, encourage children to brush their teeth after meals and rinse their mouths frequently. 3. medication: if necessary, you can also use drugs, oral and oral solution to help digestion, probiotics such as Lactobacillus acidophilus to improve the distribution of intestinal flora, to improve the bad breath accumulation of food. The above medication, should be used under the guidance of a doctor, not blindly use their own medication, so as not to cause adverse consequences.