Can hypothyroidism and hyperthyroidism go into remission? i always heard that once you start drugs fur hypo you must stay on them for life, but hyper can go back to normal, and you can go i ff the meds, is this true?

Hyperthyroidism, after treated with medications, radioactive iodine or partial thyroidectomy, can go to remission, i.e. normal thyroid function (euthyroid), without further treatment but a high percentage of cases will become hypothyroidism later. In contrast, hypothyroidism, once developed, will not go to remission and thyroid replacement therapy is required with gradually increased dose.