Lump under jaw bone painfull and it moves?

I have this too! But I have no clue what it is! At first I thought it was a pimple or something, but it like, hurts, and i can't pop it. From what i can tell, i think it is a : cyst, ingrown hair, a pimple without a white head, or a swollen sweat gland. Everybody says to just keep washing it, and it should go away, but other than seeing a dermatologist, that is all i can think of to do...