Alright, what I want you to do is feel your little ear-flip, the one where you wear earings. Now feel if there's any "lumb" inside, like a zit. Do you got one?
If you got one, its an infection! Congratulations!
You're fine. They're extremely common and I don't know how you get them, but they are extremely annoying.
Anyone know a little more about it than me? ^^