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Autoimmune thyroid diseases, such as autoimmune thyroiditis, which is also known as Hashimotoâs thyroiditis or chronic lymphocytic thyroiditis, are conditions in which the immune system attacks the bodyâs own thyroid gland.hile chronic autoimmune thyroid diseases are generally mild or even symptomless, they can progress to significant hypothyroidism. Seek prompt medical care for worrisome symptoms of hypothyroidism, such as depression or unexplained weight gain. 1  Previous. 2  1. 3  2. 4  3.
Over active thyroid: Graves' disease is an autoimmune disorder, meaning it is caused by antibodies against the thyroid. These antibodies trick the thyroid into making more thyroid hormone than it is supposed to.