I have one on top of foot which appeared in my late thirties. I did nothing about it for years and it then transpired it had turned into a bony lump, which can’t be removed. It does cause the odd problem with shoe fitting. I have another on the right wrist which appeared in my late twenties which was going to be operated on, but then I married, moved, got pregnant and it disappeared. However, it reappeared in my late sixties and periodically comes and goes, but does cause some discomfort. Now in the latter seventies. Would seriously suggest getting something done about it, or at least finding out if it could turn bony.