could you be grinding or clenching your teeth in your sleep?
and for when i've got raw areas i put bandaids over them.... i don't know if thats the best thing to do, or if they're supposed to get air... but it does help. and eventually it sorta scabs over and then it isn't as touch sensitive. if its somewhere that needs to be able to move, you can sorta cut triangles or slits out of the sticky edge of the bandaid and it will let it move a bit more
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