Graves' disease is more than an overactive thyroidit can impact your vision, energy, sleep, and more. Learn the symptoms, causes, and treatment options so you can better understand what's happening and what Graves' disease impacts the body by causing the immune system to attack the thyroid gland, leading to an overproduction of thyroid hormones. This excess can trigger a wide range of symptoms, including Thyroid and Depression Providence Endocrine & Diabetes Specialty Centre How safe is radioactive iodine therapy? Hyperthyroidism: Symptoms, Causes and Support Strategies