Do only people with ra get nodules or can someone with osteoarthritis get them too? I ask because my mom has a marble size bump on the palm side of her wrist. She says it doesn't hurt and it just showed up when she woke up a couple of days ago. It's not red or inflammed. Any ideas? I figure if it doesn't hurt and doesn't get any bigger we will just wait til her dr appt in July or should we go sooner?