if your dr.says its allergic .co try to cure allergy.it subside itself. in ayurveda there is treatment for allergy means ige and mouth ulcer if cause by any reason .so try ayurvedic treatment.take gargal with trifala powder kashaya and honey with pinch of haldi mix and apply on it for quick healing avoid spicy food ,indigestion correct and
Take B-Complex tablets for atleast 3 days,twice daily with milk.if this helpful give feedback
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