Hyperthyroidism refers to hyperthyroidism, an endocrine disorder that is treated as prescribed by your doctor. Hyperthyroidism is a thyrotoxicosis caused by the thyroid gland itself producing too much thyroid hormone. Possible causes include diffuse toxic goiter, nodular toxic goiter, and autonomous hyperfunctional adenoma of the thyroid gland. It is an endocrine disorder because of its association with the endocrine hormone thyroid hormone. Hyperthyroidism can be treated with appropriate medications according to the specific condition, commonly used medications include methimazole and propylthiouracil, and can be treated by means of iodine 131 and surgery if necessary. Specific medication should be under the guidance of a specialist, not unauthorized use of drugs. Patients with hyperthyroidism are advised to seek timely medical attention.