Reducing the inflammation and swelling of a knocked out tooth mainly includes cold compresses, cleaning the wound, sutures, root canal treatment, etc. The clinical conditions that require anti-inflammation and swelling for a broken tooth may be lip and gum injuries, or the pulp of the tooth may be exposed by a knock. 1. Injury to soft tissues: If there is swelling in the soft tissues, cold compresses can be applied within 24 hours after trauma. If there is an exposed wound, foreign objects should be cleaned and the wound should be rinsed in time. If the wound is too large, it also needs to be sutured, and tetanus vaccine is needed if necessary. 2. Exposed pulp: Exposed pulp caused by a knocked tooth usually requires root canal treatment. It is recommended to go to the hospital in time and give targeted treatment or therapy under the guidance of the doctor.