Zombie is nearly 61 yo. She has never had a cold sore so she only knows what friends have told her or what Dr. Google can tell her.
Last night she had a funny feeling on her upper lip. When she touched it she felt a little lump.
Tonight, the lump is still there. It's not really a blister which is what Dr. Google tells her a cold sore would be. But it still tingles a bit.
Any ideas?