Whether children with hypothyroidism need lifelong medication depends on the patient’s specific situation. If the hypothyroidism is caused by subacute thyroiditis, it usually does not need lifelong medication; if the hypothyroidism is caused by Hashimoto’s thyroiditis, total thyroidectomy, or congenital absence of the thyroid gland, lifelong medication is usually needed. Subacute thyroiditis is a self-limiting thyroid disease, hypothyroidism can occur, when the disease develops to a certain stage can be improved, such cases usually do not need life-long medication; a very small number of patients with subacute thyroiditis may have permanent hypothyroidism, such cases need life-long medication. Hypothyroidism caused by Hashimoto’s thyroiditis, total thyroidectomy, and congenital thyroid deficiency usually requires lifelong treatment with levothyroxine sodium tablets to keep thyroid hormones within a reasonable range. Patients with hypothyroidism who are not sure whether they need to take lifelong medication can visit a hospital and ask their doctor to make a judgment.