Hyperthyroidism is an endocrine disease, and its causes are several: first, hyperthyroidism is related to environmental factors, such as bacterial and viral infections, oral medications such as hormones, and physical stress, all of which can cause inflammatory changes in the thyroid gland that can destroy the thyroid follicles, thus causing a toxic reaction of the thyroid gland. Secondly, too much iodine intake can cause iodine hyperthyroidism, hyperthyroidism is genetically related to complex polygenic diseases, siblings of one side of the disease and the other side of the disease is also a higher chance. Hyperthyroidism is also related to autoimmunity, such as Hashimoto’s hyperthyroidism, when a trigger causes the body to produce specific autoantibodies against the thyroid gland, stimulating the proliferation of thyroid cells and increased secretion of thyroid hormone synthesis causing hyperthyroidism. In addition, nodules and tumors can also cause hyperthyroidism, such as toxic nodular goiter, pituitary tumors, high-functioning adenomas of the thyroid gland, etc., all of which can cause hyperthyroidism.