The numbing injection for the filling should be a root canal procedure, and it is possible that the diagnosis of pulpitis or apodontitis was made before. Clinical symptoms of pulpitis include spontaneous pain at night, persistent pain from hot and cold stimulation, radiating pain in the ipsilateral ear-temporal region, and pain that cannot be localized. The clinical signs of apical tooth infection are spontaneous abdominal swelling of the tooth, biting pain and percussion pain. Lidocaine or BILANMA is usually injected using a 5 ml syringe with a very fine needle, which is essentially painless, similar to intravenous and intramuscular injections. Generally, lidocaine and Bilaam anesthesia are used to perform nerve block anesthesia or local infiltration anesthesia, and the effect lasts for 90-120 minutes. Patients can feel the doctor operating in the mouth and have a sense of touch, but generally do not feel pain. Therefore, do not be nervous and do not have fear when you go to the hospital for filling.