Hypothyroidism refers to hypothyroidism and breastfeeding is possible with normal thyroid function control. Hypothyroidism, mostly due to autoimmunity, thyroid surgery and hyperthyroidism iodine 131 treatment, these diseases can not be transmitted through breast milk, so the impact on the baby is small, but it is recommended to breastfeeding with normal thyroid function control. Hypothyroidism is treated with replacement therapy using levothyroxine sodium tablets to bring the levels of thyroid hormones to normal. This medication is rarely secreted through breast milk and has a relatively low impact on the child, so patients with hypothyroidism can breastfeed. Hypothyroidism to take the drug, it is recommended that an hour or half an hour before breakfast, while the need for regular review of thyroid function, as prescribed by the doctor to adjust the dose of levothyroxine sodium tablets.