I am sure he didn't have it a coupole of days ago. It is gum coloured (sort of bluey / pinky), about the size of a pea and hanging down from his top gum. It wobbles!
Have been googling and come up with an 'erruption cyst' which fits because he does have a tooth comming through there. But when I google images of erruption cysts (not for the faint hearted) they don't look nearly as impressive as what ds has got. Erruption cysts seem to look like a bruise or blood blister. This is a whole pea of wobbliness dangling off his gum.
Have booked a doc appt for first thing tomorrow morning. Anyone know what it might be or have any experience?