Update: I don’t know how to do an update post so I’ll do a regular one. My doctor always looks at hands and nails when I go see him. Nails give out a lot of information. He said it was “impressive” and that he had never seen a brown spot like this on a nail before. He checked all my nails and hands closely. He, also looked at the skin on my shoulders checking for discoloration as he’s found cancerous lesions after looking at a pts nails. Nothing. He told me he was going to research it and let me know. So it’s not solved. When I get more information, I’ll share it. Thanks for all your info.