Children’s bad breath needs to be clear cause and then symptomatic treatment, common causes are oral inflammation, indigestion, constipation and so on. 1. oral inflammation: children with bad breath may be due to the usual lack of attention to oral hygiene, resulting in dental caries, tooth decay, periodontitis and other oral diseases, need to pay attention to oral hygiene, to develop the habit of brushing morning and evening, to prevent the fermentation of food debris in the mouth to produce halitosis, without the need for special medication. 2. indigestion: if indigestion caused by bad breath, you need to take probiotics such as bacillus subtilis dichotomus and other drugs to help regulate intestinal flora, Bohol oral solution to promote intestinal peristalsis, to alleviate the bad breath situation. 3. constipation: constipation can also lead to bad breath, so pay attention to the reasonable arrangement of diet, especially more vegetables, fruits, etc., you can also take probiotics such as Lactobacillus acidophilus, to regulate the intestinal flora, to help relieve. If necessary, use corkscrew. All of the above medication should be used under the guidance of a doctor, avoid self-medication, in addition, there may be other reasons for children’s bad breath, it is recommended to go to the hospital in a timely manner to conduct relevant examinations, to clarify the cause of the disease after the symptomatic use of medication.