<s>[INST] I have this Wierd ball that has formed in my pinky finger. It hurts when applied pressure. A few months ago it was popping at the joint, whenever I would move it. It hardly ever does it now, but the ball has been forming over the past few weeks and it is hard and the size of a bb. Any thoughts? [/INST] Hi,Dear,your query is with incomplete info.Plz upload the photograph of the pinky finger.This would  fix the lump diagnosis and cause.Awaiting for uploads of the photo to my inbox .Thnks .And act fast.Wellcome. </s>