Children’s bad breath is caused by dietary factors, indigestion, poor oral hygiene and other reasons, you can eat probiotic drugs or cephalosporin and other antibiotic drugs to treat. 1. Dietary factors: if children consume too much meat, it is easy to cause bad breath, then you need to moderate exercise to promote food digestion, eat more vegetables, fruits and other foods, do not need to take medicine. 2. Indigestion: If children’s digestive function decreases and food accumulation occurs, bad breath will also occur, at this time you can take probiotic drugs such as bifidobacteria, which can help relieve bad breath. 3. poor oral hygiene: if children have periodontitis and other conditions, can also lead to excessive microorganisms in the mouth, resulting in bad breath, at this time you can use cephalosporin and other antibiotic drugs. In addition, children also need to pay attention to oral hygiene, brush their teeth every day, can also prevent bad breath. Children with bad breath if the persistence of unrelieved, it is recommended to go to the hospital in a timely manner, under the guidance of the doctor to treat, avoid unauthorized use of drugs. The above medications should be used in accordance with medical advice.