There are dark brown splotched on my hands. One in-between my index finger and thumb (with a bit on my thumb as well), and on my other hand its on the top of my pinky and the side of my ring finger. It doesn't hurt, nor is it raised. It showed up overnight because it wasn't there yesterday. It kind of resembles brown paint smeared, but i haven't used any paint in a long time. Should i get it checked out or scrub my hands (tried that and nothing happened), or just leave it alone?