I noticed it about two weeks ago while on vacation, and it appeared out of nowhere! It's completely painless, and it's about the size of a nickel on the inside of my cheek. It's not much different in color from the rest of my mouth, and I can't remember what it looked like when it first formed. The surface feels soft, almost velvety. I have only been smoking for less that two years, so when I asked a cancer specialist they said it's 1/1,000,000 chance that it's any type of cancer. I do drink a lot of soda, but I have for my whole 17 years of existence, so it seems very odd that it would just now happen. Any idea's as to what it is?