On my little finger, palm side up I have a lump maybe just under 0.5cm in size but it is right on the first crease/bend down? You can’t really see it unless you hold it at an angle but you can feel it. If I bend my finger back it is prominent and looks like under the skin it is a darker colour. It doesn’t move on its own, it is hard but doesn’t hurt. It has been there a long time.. i don’t want to bother the GP just now plus it doesn’t really show up in a photo to show a GP anyway... any ideas?