Question: what is the difference between thyroiditis and graves disease?
Answer: In both conditions, the immune system influences the action of the thyroid gland in some way. Graves' is a type of hyperthyroidism; that is, the thyroid is overactive. This is because antibodies stimulate the TSH receptor in thyroid cells. Hashimoto's is a type of hypothyroidism; that is, the thyroid is underactive.