hi. i used to get these white spots all the time - its plaque/food that builds up in your tonsils - people are prone to them if they have suffered tonsilitis as it leaves the tonsils scarred. i used to be able to poke these white spots and streams of gunk would come out and then leave a big hole - yuck! i had my tonsils removed as i began to suffer recurring and then constant tonsilitis - horrible operation in terms of pain afterwards but best thing i ever did as they were not doing their job properly and making me ill. if you don;t actually have tonsilitis all the time then its nothing to worry about. absolute worst case scenario is not cancer at all but having to have your tonsils out because rather than fighting infection - they themselves are getting infected.