I have terrible sensitivity in one of my double teeth at the bottom. This started last night, it isnt toothach, i know what that is like, it started after i used my new electric toothbrush. I use a good toothpaste for sensitivity every day .Has anyone else developed a problem similar. I have my normal 6month check up booked for December but i will call surgery on Monday for an emergency appointment as i am off to India bit later this month and dont want an issue whilst over there. By the way does travel insurance cover dental treatment if it is necessary while away??