Anyone have any idea? It's about 1.5cm across, an oval shape and is very light brown (am white skinned - it's lighter than all my freckles/moles but darker than my skin). It doesn't itch or bleed and is totally flat against the skin. Not scaly: you wouldn't notice it but for the pigmentation. It's just below my middle knuckle. I think I've got a much smaller patch of the same type of thing on the side of another knuckle.
Am only 30 so don't think it could be a liver spot...?