Root canal treatment without anesthesia is usually done when the pulp is already necrotic and no anesthesia is needed, and root canal preparation, root canal disinfection, and root canal filling can be performed directly. The details are as follows. Root canal treatment is applicable to the treatment of pulpitis, pulp necrosis, apical periodontitis and other diseases, if the pulp has been necrotic or even periapical periodontitis, the pulp nerve loses the ability to conduct pain, at this time, the root canal preparation can be carried out directly, without the need for local anesthesia. Specialized instruments are used to remove the infected material from the root canal and prepare the canal in a way that facilitates flushing and filling. A complete root canal treatment also includes subsequent root canal disinfection and filling, and in the case of root cysts, apical surgery. It is up to the doctor to make a judgment as to whether or not anesthesia should be used during root canal treatment, and in some cases it is necessary to use anesthesia during root canal treatment. It is recommended to visit a regular medical institution and receive professional treatment as prescribed by the doctor.