Hi ive had this red area on palate just behind front teeth for about 18 months it does not bother me apart from my anxiety. Been to docs and dentists but they think its nothing. If i dont touch or rub with tongue it gets a white coating which rubs off. Is this something to worry about or just thrush. Baring in mind its been well over a year and has not got worse or progressed so could it be cancerous? I have left it and my anxiety has been better however i have checked again recently advice will be much appreciated. Thanks