I am a 70 year old woman who, two months ago, developed a blister-like lesion near the edge of my lower lip
. I thought it was a fever blister
(as I am subject to these.) However, it does not act like a fever blister. It is hard, sore and does not appear to contain anything other than clear liquid (if that). It will not drain or dry up. Do I need to see a dermatologist or is this something that will eventually heal itself? I've used Abreva on it, but that has no effect.