Hyperthyroidism occurs when the thyroid gland makes too much thyroid hormone. This speeds up your metabolism—how your body uses energy. This condition can cause you to be very active, lose weight, and have sleep problems, eye problems, and a fast heart rate. It can also cause a goiter. A goiter is an enlarged thyroid gland that you can see at the front of the neck.
Hyperthyroidism is often caused by Graves' disease. In Graves' disease, the body's defense (immune) system attacks the thyroid gland.
Your doctor may prescribe a beta-blocker medicine to slow your pulse and calm you down. But this is not a treatment for hyperthyroidism. It is given for your fast heart rate. Your doctor may also give you antithyroid medicine. This medicine keeps excess thyroid hormone in check. In some cases, doctors recommend radioactive iodine or surgery to remove the thyroid. After either of these treatments, you may need to take medicine to replace thyroid hormone for the rest of your life.
Hyperthyroidism means that your body has too much thyroid hormone, which controls how your body uses energy. Too much thyroid hormone can make you lose weight quickly, have a fast heartbeat, sweat a lot, or feel nervous and moody. If it isn't treated, it can cause serious problems.
You may have no symptoms of hyperthyroidism. Or, you may feel nervous, moody, weak, or tired. Other symptoms include shaking hands, feeling hot and sweaty, and losing weight, even if you are eating normally.
Radioactive iodine is the most common treatment for hyperthyroidism. Most people are cured after taking one dose. It destroys part of your thyroid gland. Antithyroid medicine pills may be prescribed if your symptoms are mild. If they stop working, you may need to try radioactive iodine.
Radioactive iodine is given as a liquid or capsule that you swallow. The iodine is taken up by your thyroid gland. The radioactivity in the iodine kills most or all of the tissue in your thyroid gland. But it doesn't harm any other parts of your body.
Most people are cured of hyperthyroidism after one dose of the medicine.
Radioactive iodine damages your thyroid gland. Over time, most people who take it develop hypothyroidism (having too little thyroid hormone). If you have hypothyroidism, you can replace the thyroid hormone by taking thyroid hormone medicine for the rest of your life.
Radioactive iodine shouldn't be used by children. And it shouldn't be used by women who:
Your doctor will ask questions about your past health and your symptoms and will do a physical exam to diagnose hyperthyroidism. If your doctor thinks you may have the condition, he or she will order blood tests to see how much thyroid hormone your body is making.
Antithyroid medicine is often used for hyperthyroidism. It works faster than radioactive iodine therapy. And unlike radioactive iodine, it doesn't cause lasting thyroid damage.
You also may take this medicine before you have radioactive iodine treatment or surgery. Taking it may bring your metabolism to normal, make you feel better, or reduce the chances of more serious problems.
Antithyroid medicine controls hyperthyroidism in many people. But:
You may take beta-blockers or other medicines to treat symptoms such as a fast heartbeat or dry eyes until your thyroid improves.
Surgery for hyperthyroidism is called thyroidectomy. It removes part or all of the thyroid gland. Doctors rarely use this surgery to treat hyperthyroidism. It's riskier than other treatments.
You may need surgery if:
Your doctor will have you take antithyroid medicines if you have any surgery for the condition.
After surgery, your doctor will check your thyroid hormone levels regularly. That's because you could get hypothyroidism (too little thyroid hormone).
Graves' ophthalmopathy is one complication of hyperthyroidism. People with this condition develop eye problems, including bulging, reddened eyes. In rare cases, hyperthyroidism can cause a life-threatening condition called thyroid storm. This happens when the thyroid gland releases large amounts of thyroid hormones in a short period of time.
Graves' disease causes most hyperthyroidism. In Graves' disease, the body's natural defense (immune) system attacks the thyroid gland. The thyroid reacts by making too much thyroid hormone. Graves' disease often runs in families. Sometimes hyperthyroidism is caused by a swollen thyroid or small growths in the thyroid called thyroid nodules.
Hyperthyroidism means your thyroid gland makes too much thyroid hormone. Thyroid hormone controls how your body uses energy, also called metabolism. When you have too much thyroid hormone, your metabolism speeds up. You may lose weight quickly or feel nervous and moody. Or you may have no symptoms at all.
Call your doctor now or seek immediate medical care if:
Watch closely for changes in your health, and be sure to contact your doctor if:
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