Hyperthyroidism results when the thyroid gland, located in the front of the neck, produces too much thyroid hormone. The thyroid controls metabolism, so if it is overactive, it may lead to weight loss, hair loss, a fast heartbeat, sweating, tiredness, shakiness, and moodiness. Graves' disease is the most common type of hyperthyroidism. Hyperthyroidism is easily treated, usually with radioactive iodine and antithyroid medicine. Follow the links below to find WebMD's comprehensive coverage about hyperthyroidism and how it develops, how it is diagnosed and treated, and much more.
What is Hyperthyroidism? What Are the Symptoms?
If you have an immune disorder called hyperthyroidism, you may notice changes in your body. Learn how to identify the symptoms of hyperthyroidism.
What Are the Causes of Hyperthyroidism?
There are many different reasons you might develop an immune disease called hyperthyroidism. Learn how your thyroid works and the different causes of hyperthyroidism.
What Are the Treatments for Hyperthyroidism?
WebMD explains the treatment options for hyperthyroidism.
Thyroid Problems -- Symptoms, Causes, and Diagnosis
Learn more from WebMD about the causes of different types of thyroid problems.
Fatigued or Full Throttle: Is Your Thyroid to Blame?
Feeling all revved up, even at bedtime? Or maybe your throttle’s on idle with symptoms of depression, fatigue, and weight gain. In both cases, the root cause may be your thyroid.
Carla Overbeck, U.S. National Women's Soccer Team
Graves' disease is an autoimmune disorder in which the body's immune system, for largely unknown reasons, produces antibodies to parts of the body.
Slideshows & Images
The Thyroid (Human Anatomy): Picture, Function, Definition, Location in the Body, and More
WebMD's Thyroid Anatomy Page provides a detailed image of the thyroid as well as a definition and information related to the thyroid. Learn about the conditions that affect this organ as well as its function and location in the body.
Slideshow: Thyroid Symptoms and Solutions
We look at hidden thyroid disorders, from symptoms to treatments, with pictures and illustrations.
Slideshow: Foods that Help or Hurt Your Thyroid
What you eat can affect how your thyroid works. See which foods make a difference.
Picture of Graves’ Disease
Graves’ disease. A composite image illustrates: proptosis, lid retraction; thyroid acropachy (osteoarthropathy) with clubbing; and the pink- and skin-colored papules, nodules and plaques in the pretibial region.