I would make an appointment at a dermatologist as soon as possible. Probably nothing but in my opinion something like that sprouts up, get it checked out...
It's called a halo mole. Tell your dermatologist but it's typically nothing to worry around and there is really no treatment. Always use sunscreen which is a no brainer.
Re: Mole!?.. With white ring around?
https://dermnetnz.mobify.me/lesions/halo-mole.html
*edit: link added*
My source: first hand experience