The baby’s hypothyroidism can be breastfed without medication, but the untreated hypothyroidism will also affect the baby’s health condition. Levothyroxine sodium tablets are the medication for hypothyroidism and can be used during breastfeeding period, and taking the medication won’t affect the breastfeeding either. The baby has its own thyroid gland can secrete thyroid hormone, so it will not depend on the mother to secrete, so the mother of hypothyroidism without medication can breastfeeding, and does not affect the baby; but hypothyroidism without treatment will affect the mother, there will be a generalized weakness, fear of cold, weight gain, constipation and other symptoms, so hypothyroidism should be treated in a timely manner. Baby moms can use levothyroxine sodium tablets under the guidance of professional doctors, this drug is a nursing period can be used during the drug can be normal breastfeeding. Breastfeeding need to eat a light diet, breastfeeding hypothyroidism patients must be regular review, under the guidance of the physician according to the condition of timely adjustment of drug dosage, and actively control the condition.