An endodontic emergency is a situation requiring immediate treatment due to severe pain and/or swelling. It may involve rescheduling normal appointments. Key factors in diagnosing an emergency include whether the problem is disturbing sleep, eating or concentration. Accurate diagnosis involves determining the cause, such as microbial infection, mechanical trauma or chemical irritants. Non-surgical emergency treatment may involve pulpotomy, pulpectomy or incision and drainage, while surgical treatment includes incision or trephination. Definitive treatment, antibiotics and analgesics are aimed at resolving the underlying etiology and symptoms.