The cause of silent thyroiditis is uncertain, but the condition
is believed to be an immune-system disorder triggered by
childbirth.
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People who have subacute thyroiditis feel feverish, weak, and
tired. The thyroid is sore to the touch. They may be nervous,
sweat, and have trouble tolerating heat or swallowing
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When the immune system attacks the thyroid tissue, Hashimoto's thyroiditis or Graves' disease can develop. While both conditions are classified as thyroid autoimmune diseases, they have different symptoms and treatments.