Layer of skin over pimple?

I have this pimple that has been there for a while now. I never noticed it so that's why I didn't pop it at that time. Now, there's like a layer of skin formed over the pimple so it's basically almost impossible to pop. I'm wondering... do any of you guys have this too and do you know of any ways to get rid of it? Like should I take a disinfected hot needle and pick off the skin then pop it or what? HELP! thanks.