The purpose of a hyperthyroidism symptoms checklist is to help people identify whether they may have hyperthyroidism, so that they can seek medical treatment. Hyperthyroidism is a condition in which the thyroid gland produces too much thyroid hormone. Symptoms of hyperthyroidism include weight loss, increased heart rate, and difficulty sleeping. If left untreated, hyperthyroidism can lead to heart problems, osteoporosis, and diabetes. A hyperthyroidism symptoms checklist can help people identify the early signs of hyperthyroidism and get the treatment they need before these more serious problems develop.