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Causes for Low Thyroid

Any medical condition or injury that affects the thyroid gland, the pituitary gland, or the hypothalamus can cause low thyroid levels. Specific things that can lead to this condition include but are not limited to:
  • Hashimoto's thyroiditis
  • Surgical removal of part or all of the thyroid gland
  • Radiation treatment of the thyroid
  • Certain medications
  • Iodine deficiency or excess.
Medications used to treat certain types of cancer can cause hypothyroidism as well. In some cases, people are even born with it. Ninety-five percent of all cases are due to problems with the thyroid gland itself (this is called primary hypothyroidism).
Once the cause of low thyroid levels is identified, a treatment plan can be designed.
(Click Hypothyroidism Causes to learn more about what causes low thyroid levels, including how the condition is categorized, the different types of hypothyroidism, and statistics on who the disorder affects.)
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