How old is he now? H can ulcerate when rapid growth is happening and we've even seen it with involution as the skin just can't hold up to the changes. The inner lip is ulcerating? I would contact his doctor and find out if you can put zinc oxide product on it being in the mouth...and the taste might make him angry. Yes, do try to post a picture or email me one. If the ulcer continues to get worse and does bleed... laser is sometimes an option to heal the ulcer.
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