I had melanoma removed from the bottom of my foot… a place that never receives sunlight. The spot was there for 15 years before I decided to get it checked. It was a slow mover I guess you could say.
that being said, I have a dark ugly spot on my back that doctors are not concerned about and that has been there for just as long.
Odds are your spot is just a funny mole and you won’t have to worry about it.
BUT get it looked at for peace of mind, please. And include annual skin checks in your routine of health care.