A thyroid gland that makes excessive amounts of thyroid hormone, is known as hyperthyroidism. The hormones responsible for regulating metabolism and calcium balance are thyroxine (T4) and triiodothyronine (T3). The condition is caused by abnormal production of these hormones. Attributing diseases that exacerbate hyperthyroidism are Grave’s Disease, and Thyroiditis. Symptoms and severity are symbiotic, as the gland increases in size, symptoms worsen. To learn more about thyroid diseases and complications, visit www.FindaTopDoc.com today.