Hypothyroidism (underactive thyroid)

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Risk factors

By Mayo Clinic staff

Although anyone can develop hypothyroidism, it occurs mainly in women older than 50, and the risk of developing the disorder increases with age. You also have an increased risk if you:

  • Have a close relative, such as a parent or grandparent, with an autoimmune disease
  • Have been treated with radioactive iodine or anti-thyroid medications
  • Received radiation to your neck or upper chest
  • Have had thyroid surgery (partial thyroidectomy)

DS00353

June 12, 2008

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