My bottom lip really hurts. It started swelling painfully yesterday and in the evening I spotted a small ulcer just inside my lip.
Today it's swollen more if anything, there is a second ulcer on the other side of my inner lip and a blister on the lower edge.
I've never had a cold sore, despite exposure. I always assumed I was immune. Also, it seems to be covering a very large area for a cold sore.
Does anyone know what it could be? Any advice? It's very painful.