Some patients who have fillings have to take several medications before starting the filling, generally refers to the situation where the lesion invades the pulp and requires several treatments when doing root canal treatment, the reason for doing so is to remove the infected pulp in order to perform root canal filling, otherwise the inflammation will continue to develop after the filling. 1. Some patients with fillings have to be medicated several times before starting the filling, mainly related to the spread of the lesion to the pulp and the severity of the condition, which requires adequate cavity disinfection treatment. If the patient does not follow the doctor’s instructions to use medication first, it is easy to increase the difficulty of filling or induce infection, which affects the effect of filling and restoration of the normal function of the tooth. If the lesion involves the nerve, root canal treatment is required. 2. Some patients have infections and tissue swelling before filling, which need to be treated with medication as prescribed by the doctor. The purpose of dental filling is to repair the defective tooth tissue and restore the function of the tooth, so patients need to cooperate with the doctor to choose the appropriate filling plan according to their own conditions. It is recommended that patients follow the doctor’s instructions to use medication, and not to use drugs indiscriminately. Pay attention to daily oral care, avoid eating spicy and stimulating, chewing hard food and sweets, and brush and rinse your teeth in time after meals to prevent infections.