Babies, like adults, can develop bad breath if they don’t clean their mouths properly. When a child has bad breath, many children do not want to play with him. What should I do if my baby’s mouth smells bad? One, train your baby to pay attention to oral hygiene habits from childhood, do rinse after meals, morning and evening brush teeth. 3 years old before the baby can not brush teeth, you can use water or gauze to clean the mouth after each meal. Second, the diet should be regular, eat more vegetables and fruits, coarse and fine with, not picky, not partial food, not overeating. Eat less and more meals to prevent indigestion. Pay attention to the prevention and timely treatment of tooth decay and tooth misalignment. Eat less sweets, especially not to eat sweets before bedtime. Create a good family environment, maintain the baby’s optimistic mood, and keep the normal secretion of oral saliva. Wash and disinfect the baby’s food utensils and milk utensils frequently, and keep the mother’s nipples clean and hygienic to prevent the occurrence of stomatitis.