Hypothyroid mothers can breastfeed without treatment, but it is recommended that mothers receive regular treatment to stabilize thyroid hormone levels before breastfeeding, otherwise the condition may progress. Normal breastfeeding for hypothyroid mothers is possible, and the disease has no significant effect on the mother or the fetus. However, it is best for mothers to breastfeed after they have stabilized their condition through medication such as levothyroxine, as regular medication will not have a significant impact on breastfeeding. Patients with hypothyroidism need to pay special attention to the continued use of thyroxine treatment during pregnancy and breastfeeding, and are advised to consult a doctor in a timely manner for standardized treatment under the guidance of the doctor.