H.M.
As I hygienist I see mucoceles quite often but don't recall ever seeing one on a small child and in your case a baby. My husband had one removed in the same area. It kept popping and was becoming an irritation for him because it was in the way of eating and talking since it would rub against his teeth. The wound healed in about a week or so and sutures dissolved around the same time but he said the sensation in that area didn't come back for another couple of months. I would probably get a second opinion. In a way it would be good to have it removed if it is causing irritation (is he trying to bite it, is it popping, etc) and since he is so young. But on the other hand, I have patients that have mucoceles that don't create a problem so they leave it. Hope this helps. Good luck with whatever you decide.