Can you tell me about what and where do I need to get my back skin to be treated?

I have skin probems on my back and use body wash and clean my back daily, even I use gentle scubber.It seems my back is not clear up with healthy glow. I see my back with dark spots(blotch,pimples, or blackhead)a I have no health insurance to see dermatologist; I work part tiime. I never been treated to a spa . I was thinking to go there and see their price ranges. I can't even reach to put clear skin solution. With experienced customers or advisors greatly appreciated to my questions.