Children’s mouth stinks no specific what to eat to regulate. May be dental caries, indigestion, Helicobacter pylori infection and other causes, can be strengthened through oral care, dietary adjustments, take medication to regulate. 1. Dental caries: due to the small children long-term excessive sugar, coupled with the brushing is not thorough will cause dental caries, which leads to the child’s mouth stinks. Parents should urge their children to eat less sweets, pay attention to oral hygiene, brush their teeth diligently, etc., and seek medical treatment if necessary. 2. indigestion: children over-eating spicy, greasy, stimulating food, will lead to gastrointestinal dysfunction, indigestion, and thus the symptoms of bad breath. Parents should pay attention to a light diet, eat easily digested and absorbed food, and if necessary, follow the doctor’s instructions to take probiotics and other drugs. 3. Helicobacter pylori infection: Helicobacter pylori infection may also cause bad breath. Children should pay attention to maintain a good diet and lifestyle habits, if necessary, seek medical attention, under the guidance of the doctor for anti-Helicobacter pylori treatment. Small children may also have other causes of bad breath, the symptoms have not been relieved, it is recommended to consult a doctor in a timely manner, improve the relevant examination, to clarify the cause of the disease, symptomatic treatment.