One year old baby appeared to have bad breath need to first determine the causes of bad breath, such as food accumulation, constipation, oral hygiene problems, etc., need to be targeted to give treatment. Such as the use of probiotics, massage abdomen, adjusting eating habits. 1.1 year old baby gastrointestinal function is relatively weak, the child added too much complementary food, too miscellaneous easy to cause intestinal disorders to form the accumulation of food, the baby can appear abdominal pain, abdominal distension, halitosis symptoms. It is recommended to adjust the diet, let the baby eat less and more meals, may be appropriate to follow the doctor’s orders to supplement probiotics to improve intestinal flora, you can also clockwise massage around the baby’s navel, to promote intestinal peristalsis, to help digestion. 2. Some babies have bloating, constipation will also have bad breath symptoms. Parents can usually in the baby eating half an hour or an hour after the clockwise massage baby abdomen, to help the baby defecation. 3. A one-year-old baby’s diet is mostly dairy-based, both breast milk and milk powder contains sugar. If you don’t rinse your mouth in time after drinking milk, the sugar stays in the mouth for too long and produces acid, causing bad breath. It is recommended that babies drink warm water after eating milk or supplemental food to flush out the residual substances in the mouth. Therefore, a one-year-old baby with bad breath, you should observe more details of the baby, pay attention to oral hygiene, reasonable arrangement of the baby’s diet, and if necessary, timely access to medical care.