Bad toothache may be caused by pulpitis, periapical inflammation and other diseases, there is no so-called quick pain relief methods, commonly used pain relief methods are open pulp drainage, incision and drainage, etc., as follows. 1. Pulpitis: opening the pulp under local anesthesia to drain the inflammatory exudate in the pulp cavity, removing all or most of the pulp, relieving the high pressure in the pulp cavity, which can reduce the pain. 2. Periapical inflammation: open the pulp under local anesthesia, unclog the apical foramen, establish a drainage channel, drain the apical exudate and pus to relieve pain. If the abscess is located in the submucosa or subperiosteum, the opening of the pulp cavity and incision and drainage of pus can be carried out at the same time, which is conducive to relieving pain. There may be other reasons for tooth pain, so it is recommended to go to the hospital in time to receive professional treatment as soon as possible.