Hyperthyroidism means your thyroid gland makes too much thyroid hormone. Common symptoms of hyperthyroidism include fatigue, heat intolerance, sweating, weight loss despite good appetite, shakiness, inappropriate anxiety, palpitations of the heart, shortness of breath, tetchiness and agitation, poor sleep, thirst, nausea and increased frequency of defecation. If you experience any of these symptoms, you have to call your doctor and to follow a treatment. A simple blood test is the first step in the diagnosis. Hyperthyroidism is usually treated with anti-thyroid medication (beta-blockers), and radioactive iodine. Sometimes surgery is used to remove the thyroid tissue that is producing the excessive thyroid hormone. Beta-blockers are used to treat some of the symptoms, including rapid heart rate, sweating, and anxiety until the hyperthyroidism can be controlled. Radioactive iodine is given orally on a one-time basis to slow down a hyperactive gland. Without treatment, hyperthyroidism can lead to heart problems, bone problems, and a dangerous condition called thyroid storm.