Frequently asked question: What is Hashimoto's thyroiditis?

Hashimoto's thyroiditis is an auto-immune disease. This means that there is a disruption in your immune system. Your immune system protects you from intruders, such as bacteria and viruses, so that you do not get sick. It is a very intelligent system that can recognize, attack and deactivate foreign substances that enter your body. When this happens, you will often have fever, swelling, pain and redness: the signs of an infection.
Sometimes this response is intense, and sometimes you hardly notice it. If you have an auto-immune disease, your immune system attacks your own tissues, just as if they were foreign substances. In the case of Hashimoto's thyroiditis, the thyroid gland cells are attacked and, as a result, they become damaged. It is not clear why the immune system does this.

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