don't like this

I noticed this little brown spot on my pinkie today, just under the nail and extending onto the cuticle. I expected to be able to wash it off, but couldn't. I hope it's a bruise, but I don't recall smashing my finger. It feels tender but then so do all of my cuticles.

As far as I know, it's unusual to see pigmentation like this. I'll have to present this to the dermatologist when I go for my next biopsy the first week of April, if it hasn't resolved by then.