About 8 weeks ago, a small, raised, circular black dot appeared on my wrist. It started to grow quickly, and eventually became about a millimeter in diameter. At that point, I was able to scratch it off my skin and after examining it, the growth was rock hard, and almost perfectly circular. I wasn't worried about it, but it came back in the same exact spot and is growing again. I figure it cannot be nodular melanoma due to the fact it scratched off easily, Fam h/o skin cancer 21 y/o pale male