It's been on my arm for like 1/2 years now. its shaped like a pimple or something. I try picking at it and it's just bleeds. then about 3 weeks later the skin grows back on it, then it goes back to it's regular self. I don't think its a boil. Ive seen photos and it dont look like that. can anybody tell me what this is? and what it means?
Maybe its a wart or a corn (look it up).
It could be a mole. has it changed color or shape since you've had it? if it's black (not brown but BLACK), or has rough-looking edges, see a dermatologist; skin cancer is very common on the arm, and the sooner you catch it the easier it is to treat it.