What's in your toothpaste? Sodium Laural Sulphate, the foaming agent, causes my burning mouth: particularly with chocolate, bananas, butter - to the point that I am unable to eat. Is there an ulcer on the roof of your mouth, if so try Bonjela .
As well as it being The Time of Year do show a Pharmacist with your HRT regime if you can't access your dental surgery.
Is there any info in the leflet in the box? Let. us know how you get on.