Leave it alone: Just leave it alone and let it heal. Any thing you do is going to make it irritated and annoyed.
Answered 1/11/2013
5.5k views
Visit the dentist: I do not know of a blood blister. Could be a mucocele, apthous ulcer, or burn. It would be best to visit your dentist.
Answered 5/5/2016
5.5k views
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