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Thyroid, overactive

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Introduction
Overactive thyroid (also known as hyperthyroidism) is a relatively common condition that occurs when there is too much thyroid hormone in the body.
Symptoms of overactive thyroid
Symptoms of an overactive thyroid gland include unexplained weight loss, rapid heartbeat, anxiety and excessive sweating.
Causes of overactive thyroid
The most common cause of an overactive thyroid gland is Graves' disease, which is caused by the immune system attacking the thyroid gland.
Diagnosing overactive thyroid
A diagnosis will be based on your symptoms and the results of a blood test that assesses how well your thyroid gland is working.
Treating overactive thyroid
Treatment for overactive thyroid (hyperthyroidism) aims to return the level of thyroid hormones in your blood to normal.
Complications of overactive thyroid
Several complications can occur with an overactive thyroid (hyperthyroidism), particularly if the condition is not treated.
See what the doctor sees with Map of Medicine
Map of Medicine for overactive thyroid