What is hyperthyroidism?

A Answers (8)

  • Hyperthyroidism results when the thyroid gland produces too much thyroid hormone. The thyroid is a gland located at the base of the neck below the voice box. It is about two inches long and is shaped like a butterfly. Its purpose is to produce thyroid hormones, which regulate the body's metabolism. Hyperthyroidism can speed up the body's metabolism. This condition is also referred to as "overactive thyroid."

  • AJames Lee, MD, Endocrinology/diabetes/metabolism, answered on behalf of Columbia University Department of Surgery

    Hyperthyroidism occurs when the body has too much thyroid hormone, which can be caused by an overactive thyroid that makes too much thyroid hormone or by release of thyroid hormone as the gland is destroyed.

  • AScott Makemson, MD, Obstetrics & Gynecology, answered on behalf of Carolinas HealthCare System
    Hyperthyroidism is the overactivity of the thyroid gland, leading to overproduction of thyroid hormones. It can make the body's metabolism overactive, leading to symptoms such as weight loss and rapid heart rate.
  • Hyperthyroidism is overactivity of the thyroid gland, leading to overproduction of thyroid hormones. It can make the body's metabolism overactive, leading to symptoms such as weight loss and rapid heart rate.
  • AHealthwise answered
    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.

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  • AGeorge Tershakovec, MD, General Surgery, answered on behalf of Baptist Health South Florida
    Hyperthyroidism is a medical term that refers to an overactive thyroid. Your thyroid is a butterfly-shaped gland in the front of your neck that produces thyroid hormone, which helps to regulate your metabolism.
    When your thyroid produces too much thyroid hormone, you may be diagnosed with hyperthyroidism, which may cause you to experience the following symptoms: 
    • feeling hot
    • excessive sweating
    • feeling nervous or jittery
    • increased bowel movements
    • rapid heart rate
    • weight loss
    • fatigue
    • difficulty concentrating
    • irregular or scant menstrual flow (in women)
    If you are experiencing these symptoms, see your doctor. By doing a physical exam and medical tests, your doctor can determine whether your thyroid is functioning normally.
  • AJoshua B. Bederson, MD, Neurosurgery, answered on behalf of The Mount Sinai Health System
    Thyroid-stimulating hormone (TSH) secreting tumors cause overproduction of TSH, which stimulates the thyroid glands to make too much thyroid hormone, thyroxine, causing hyperthyroidism. This condition accelerates metabolism and can result in weight loss, rapid heartbeat and breathlessness, decreased concentration, tremor, fatigue coupled with difficulty sleeping, nervousness, heat intolerance and excessive sweating, increased bowel movements and light or absent menstrual periods.
  • Hyperthyroidism is a disease in which the thyroid is hyperactive and makes too much thyroid hormone. Like most conditions of the thyroid gland, it is more common in women. Hyperthyroidism can be caused by either overproduction of thyroid hormone or excessive release of thyroid hormone from the thyroid gland due to inflammation and/or destruction. It is important to distinguish between these two causes, in order to choose the appropriate treatment. A thyroid uptake scan (also known as a radioactive iodine scan) can help tell the difference between these two causes. Problems causing thyroid hormone overproduction have increased uptake on thyroid scanning (a hot scan), while thyroid gland inflammation and/or destruction have low uptake on thyroid scanning. Overproduction of thyroid hormone is the most common cause of hyperthyroidism and can be caused by Graves' disease, toxic multinodular goiter, and toxic adenoma.
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