Extraction is not recommended when the blocked tooth is inflamed, because extraction of the blocked tooth during the acute inflammatory phase may lead to the spread of inflammation, which may result in the formation of infection of the surrounding tissues, even bacteremia, sepsis, or even life-threatening in severe cases. Therefore, extraction is not recommended during the period of inflammation of the blocked tooth, but is actively treated with symptomatic treatment, which generally includes local irrigation and systemic application of drugs. The local irrigation is usually done alternately with hydrogen peroxide and saline, and finally astringent iodoglycerin can be used. For systemic application of drugs, the combination of cephalosporin plus metronidazole is generally used to control systemic infection. Usually, when the inflammation has passed and the blocked tooth is in a stable and painless period, the blocked tooth is extracted to cure the disease.