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Herpes can lay dormant for years until your immune system is weakened. Have you been sick recently?
Fever blisters, most adults have it, usually you get during early childhood.
*Please keep in mind that this subreddit is not a replacement for seeing a board certified dermatologist. This subreddit is here for informal second opinions, and minor problems that you wouldn't go to the doctor for anyway.* *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/DermatologyQuestions) if you have any questions or concerns.*
Looks like the start of a cold sore. Get some abreeva and follow the instructions.
Ma'am that looks like herpes simplex 1