Hyperthyroidism occurs when the thyroid gland is overactive and makes too much thyroid hormone. Some people have a genetic predisposition to hyperthyroidism. It is more common in older people and ...

Antithyroid medications, like methimazole and propylthiouracil, are the primary treatment for hyperthyroidism. They work to reduce the amount of thyroid hormone produced by your thyroid gland. While ...

Hyperthyroidism may present with an itchy rash, hives, or changes in skin pigmentation. Medications that treat hyperthyroidism may also cause a rash. Hyperthyroidism, also known as overactive thyroid, ...

Hyperthyroidism can cause a rapid heartbeat, irregular heart rhythms, and palpitations. This can result in chest discomfort. Untreated hypothyroidism can also cause complications involving chest pain.