[maks001]

Yeah it spreads very fast, the problem is that you won't know until you feel any pain or visit a dentist.

I certainly agree.

They won't magically disappear, so cavities must be treated the moment they're Identified.

correct, I think I resisted visiting dentist at first, then after 1 week when I finally visited, he told me that one should never wait as soon as they see a problem because it may cause severe damage to one's mouth. Luckily I got cured.
Thanks