I get it, same place EVERY TIME, and usually when Im run down or tired and it just comes SO suddenly. Its part of the Herpes virus (which is what a cold sore is) and I find a cream called Cymex gets rid of the lump quickest, mine never goes scabby or spreads or goes dry like cold sores do, it just stays as a lump and then goes, rather annoying.
(mine started cause when I was about 10 I caught the herpes virus (and no it wasnt cause I was a rude girl at that age lol) and my whole mouth and throat was covered in sores for 3 weeks of agony and no eating etc (most painfull thing ive ever had) and once the virus is in your body, you never get rid of it so it keeps coming back in this one place grrrrr)