My granddaughter was 14 years old and was recently diagnosed with autoimmune thyroiditis. What caused this?

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1 Answer

These messages are for mutual support and information sharing only. Always consult your doctor before trying anything you read here.

Doctors don’t fully understand why your immune system misfires this way. It could be set off by a faulty gene, a virus, or something else. Or it could be a combination of causes.

You may be more likely to get autoimmune thyroiditis if you:

  • Are a woman
  • Are middle-aged
  • Have another autoimmune disorder like lupus, type 1 diabetes, or rheumatoid arthritis
  • Are related to someone who has autoimmune thyroiditis
  • Have been exposed to environmental radiation
...