I have a conical lump on my back the size of a nickel with a small dark dot on the center. the bumb is raised about 2 to 3 mm from the surface of the skin. i am a white male, 32 years old. the bump is hard to the touch and has been present for at least tw

Hard : Hard to tell without a clinical exam so i would see a dermatologist. Perhaps it is a cyst, a mole, a dermatofibroma, or other possibilities. I would see a dermatologist to verify that it is benign. I hope that is helpful. Visit the link below and click on skin growths, cysts, and moles to see a picture of some of these conditions. I hope that helps!