A to Z: Canker Soresenparentshttps://kidshealth.org/EN/images/headers/P-khAZDictionary-enHD-AR1.jpgSee Apthous Ulcers (Canker Sores).oral aphthae, canker sores, aphthous ulcers, nutritional deficiencies, mouth injuries, lip biting, emotional stress, folic acid, vitamin B12, iron02/11/201303/25/201903/25/20192046c081-7805-49de-9bc5-5ad601bff011https://kidshealth.org/ws/RadyChildrens/en/parents/az-canker.html/<p><a href="https://kidshealth.org/ws/RadyChildrens/en/parents/dictionary/"><img class="right" title="Parents image" src="https://kidshealth.org/EN/images/buttons/P-atoZDictionary-enBT.jpg" alt="A to Z Dictionary 500 Go" name="5093-P_ATOZDICTIONARY2_ENBT.JPG" /></a></p> <p>See: <a href="https://kidshealth.org/ws/RadyChildrens/en/parents/az-apthous.html/">Apthous Ulcers&nbsp;(Canker Sores)</a></p>kh:age-allAgesOrAgeAgnostickh:clinicalDesignation-generalPediatricskh:genre-dictionarykh:primaryClinicalDesignation-generalPediatricsChttps://kidshealth.org/ws/RadyChildrens/en/parents/dictionary/c/fdabc7bf-e1f5-4c6b-9f0b-00e1f3eac955https://kidshealth.org/EN/images/buttons/P-atoZDictionary-enBT.jpg