Generally local anesthesia medication can be used during breastfeeding without any major impact on the baby, but for safety reasons, breastfeeding can usually be continued 4-6 hours after the medication has been administered. The anesthesia used for dental fillings is usually local anesthesia, compared to general anesthesia, local anesthesia agents are used in smaller quantities. The duration of action of local anesthesia drugs is usually a few hours, and the long acting ones usually do not exceed 8 hours. Moreover, most of the anesthetic drugs are absorbed by the periodontal tissues, and the amount that enters the breast milk is usually extremely low, and the amount that reaches the baby through the breast milk is negligible. Generally, the local anesthesia used for dental treatment, tooth extraction and suturing will not affect breastfeeding. Breastfeeding women can express milk after the anesthesia disappears and wait for 2-3 hours to continue breastfeeding. If breastfeeding women have dental problems, it is recommended to go to the dentist in time, and then follow the professional doctor’s advice to carry out correct and effective treatment in time.