Hyperthyroidism mainly includes iodine hyperthyroidism, toxic diffuse goiter, multinodular toxic goiter, and autonomous hyperfunctional thyroid nodules. 1. Iodine hyperthyroidism: It is related to excessive iodine intake, for example, intake of food with high iodine content or taking iodine-containing drugs, which may cause hyperthyroidism. 2. Toxic diffuse goiter: an autoimmune disease, usually associated with the production of thyroid hormone receptor antibodies in the body, easy to cause thyroid cell hyperplasia, resulting in an increase in the secretion of thyroid hormones, which can cause hyperthyroidism. 3. Multinodular toxic goiter: mainly due to the overproduction of thyroid hormone due to the loss of control of thyroid hormone, usually occurring in middle-aged and old people. 4. Autonomous high-functioning thyroid nodules: usually associated with genetic mutations in thyroid cells or caused by excessive synthesis of iodothyroid hormone by the autonomy of the thyroid gland. There are many other triggering factors for hyperthyroidism, such as family genetics, abnormal estrogen levels in women, autoimmune abnormalities, etc., which may induce hyperthyroidism. It is recommended to consult a doctor as soon as possible to analyze the cause of the disease and then target treatment.