What is this?

I’ve never even had so much as a cold sore. There’s a chance it’s probably just dry/dead skin but since I’ve never had anything like this before I’m freaked out. I’ve been dating the same guy for a year and I have never cheated. I don’t really have the means to get to a doctor quickly anyways so I’m hoping it doesn’t look like anything I should get tested for. I am prone to getting pimples right in the corner of my mouth along my lip line but never on my lips like that. It doesn’t hurt or itch at all. So far it’s only on the bottom lip in that corner. Should I be worried? If not, what are some at home things I can do to get rid of it? It’s not noticeable at all unless you’re really looking for it but it still freaks me out.