You are correct, your son's mouth sores result from him mouth breathing all the time. You need to find and treat the cause of his mouth breathing which may be enlarged adenoids or a nasal allergy problem. Please take him to see an ENT specialist so that you can get a proper diagnosis of his problem. In the meantime use zinc cream on his lips at night only to try and heal his sores
The information provided does not constitute a diagnosis of your condition. You should consult a medical practitioner or other appropriate health care professional for a physical exmanication, diagnosis and formal
advice. Health24 and the expert accept no responsibility or liability for any damage or personal harm you may suffer resulting from making use of this content.