I went for a perm crown fitting (front tooth). The nurse tried to remove the temp but the pain was so severe that my nose bled. Numbing gel was applied and she tugged/pulled for 2 mins w/o success -- the pain was so intense that I fainted. Novocain was injected but same result. (I have high tolerance for pain.) I was rescheduled as further irritation may result in a root canal. Is this pain normal? Won't coming in on another day have the same results? Never had cavities or other dental work.