Hyperthyroidism, also known as overactive thyroid, is a condition in which your thyroid gland makes and releases more thyroid hormone than your body needs. This extra hormone speeds up many body processes and can affect your metabolism, heart, energy level, and overall health.
Common symptoms of hyperthyroidism:
Hyperthyroidism happens when the thyroid gland releases too much thyroid hormone into the bloodstream. Conditions that can lead to hyperthyroidism include:
Diagnosis of hyperthyroidism usually involves several steps:
Factors that increase your risk of developing hyperthyroidism include:
There are several treatment options for hyperthyroidism. Depending on the cause and your health, your healthcare provider will help you choose the best plan. Common treatments include:
Antithyroid Medications: These medicines help slow down the thyroid gland so it makes less hormone. Examples include methimazole and propylthiouracil (PTU). They are often used first to control the condition and may be taken for many months. Some people may go into long-term remission after treatment.
Surgery (Thyroidectomy) : In some cases, a surgeon removes part or all of the thyroid gland. This quickly stops the thyroid from making too much hormone but usually leads to hypothyroidism (underactive thyroid), so you’ll need lifelong thyroid hormone replacement. It is chosen when other treatments are not suitable or in specific cases like large goiters or pregnancy.
Radioactive Iodine Therapy: You take a small dose of radioactive iodine by mouth. The thyroid absorbs it, and this gradually destroys overactive thyroid cells. It often cures hyperthyroidism, but many people then need to take thyroid hormone replacement medicine for life because the thyroid stops working.
Beta-Blocker Medications (Symptom Relief): Beta-blockers do not lower thyroid hormone levels, but they help control symptoms like fast heartbeat, shakiness, and anxiety while other treatments take effect. Examples include propranolol and metoprolol.