medlineplus.gov/ency/article/000356.htm Hyperthyroidism at the National Library of Medicine hyperthyroidism “Hyperthyroidism.” U.S. National Library of Medicine: Hyperthyroidism “Hyperthyroidism.” MedlinePlus.com: Hyperthyroidism https://medlineplus.gov/ency/article/000356.htm “Hyperthyroidism.” https://medlineplus.gov/ency/article/000356.htm Hyperthyroidism Hyperthyroidism Hyperthyroidism Hyperthyroidism Hyperthyroidism MedlinePlus.com: Hyperthyroidism Thyrotoxicosis