A 26-year-old male asked:
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what could cause a sudden incidence of canker sores on the inside of mouth and lips? theyre not cold sores and i haven't had sex recently to contract hiv or anything. i never get them now i have 4-5 sore persistent ones all at once. i also eat good.

1 doctor answer
Dr. John Chiu
Dr. John Chiu answered
56 years experience Allergy and Immunology
No sure answer: There is no sure answer to this question. Stress has been associated with canker sores. Some have suspected that this may be from strep mutans- an organism found normally in the mouth and considered responsible for dental caries. Have you had your teeth cleaned at least twice yearly, flossed daily, and brushed thoroughly at least 2x daily? Good dental hygiene may help.
Answered on Aug 18, 2015

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