I have a painless 1cm red bump at the top of my lower lip. I've had canker sores before but never had a cold sore. However, I can't tell what this is.

At the top of your l. Lip it's usually a canker sore. If you wish to have it looked at I could see you for a virtual concierge consult through healthtap for a more definitive diagnosis and treatment. During the virtual consult I may see pictures of your lip or a live webcam as well. Best wishes. .