Hannah asked:

okay, before I explain I’d like to tell you that I am 13, I don’t smoke, I don’t drink coffee. My teeth are very dull and getting yellow! But I have like two little irregular shaped bright white spots on my teeth. I hate having dull/yellow teeth with about two tiny patches of white on my teeth! I have no idea what the white irregular shapes are. I tried using those whitening things on my teeth and after about 15 minutes I pulled them off and all Tuat happened is that tueshite patches got whiter! Help!!
I have never had fillings or braces or anything like that. And today was the first time I whitened my teeth, I’ve had the irregularly shapped white on my teeth for as long as I can remember