it bleeds if i catch it. Could it be skin cancer?

I am having a lump removed on the top of my head in a few days, but i am now worrying that it could be something serious. It has been there for over 15 years, and i assumed it was a mole as it was quite small then, but in the last few months it has grown and is now very noticeable, like a large round shiny mole. It doesn't hurt and i don't have any other symptoms, but it bleeds if i catch it. Could it be skin cancer? And can it be removed and treated without further concerns? I have very fine hair and have often had a burnt scalp from being out in the sun. I am very freckley and have alot of other moles on my skin.