Causes of Hyperthyroidism

Graves Disease 

-autoimmune disorder, antibodies stimulate too much production of thyroid hormones 

-attacks thyroid

-antithyroid medications

Thyroid nodules

-adenomas (part of gland that is walled off) causes lumps

-thyroidectomy

Thyroiditis 

-inflammation of the thyroid 

-thyroid hormone leakage into blood

-medications to decrease inflammation