i'm trying to figure out what this thing is (yes, your and my first thoughts are oral herpes) but it doesn't sound like any symptoms that seem commonly associated with it.. it started a a single red blister under my tongue along side that flap of skin at the bottom of the tongue. it swelled up with blood (i was basically constantly poling it with my tongue to check on it's state) and i thought it would almost pop. unlike oral herpes it never itched or irritated, it just sat there. then the following day the swelling came down. was still red. now, another day later the swelling is almost all gone and there's no red. just that normal tongue pink. but there seems to almost be like a fatty whitish tissue inside. anyone have any experience with any sort of blister like this? or have any ideas for what it is (the symptoms and look of it just dont seem to match herpes very well).