This document discusses various types of thyroiditis and thyrotoxicosis. It defines thyrotoxicosis as a hypermetabolic condition associated with elevated thyroid hormone levels. The causes of thyrotoxicosis include Graves' disease, toxic multinodular goiter, toxic adenoma, and certain tumors. Thyroiditis can be painful or painless and is caused by chronic autoimmune thyroiditis, postpartum thyroiditis, subacute thyroiditis, or acute infectious thyroiditis. Subacute thyroiditis presents with neck pain and signs of thyrotoxicosis. Postpartum thyroiditis can cause thyrotoxicosis, hypothyroidism, or a combination in the first postpartum year.