WebMD
Web Md: Graves' Disease
This article from WebMD Health provides great information about Graves' Disease, the leading cause of hyperthyroidism. Its symptoms, causes, and treatment is discussed. Pictures and links are provided for additional information.
Mayo Clinic
Mayo Clinic: Graves' Disease
This site from the MayoClinic.com provides a great overview of the form of hyperthyroidism known as Graves' disease. The sections in the article include signs and symptoms, causes, screening, diagnosis, treatment, and self-care.