The causes of hyperthyroidism include Graves’ disease, tumors, excessive iodine intake, etc. It is related to genetic and environmental factors, and can be triggered by infections, mental stimulation, drugs and other factors. 1. Causes: The most common cause of hyperthyroidism is toxic diffuse goiter, i.e. Graves’ disease, which belongs to autoimmune diseases and is related to genetic and environmental factors; in addition to this, pituitary TSH adenomas, long-term high intake of iodine or iodine-containing drugs and other reasons can also lead to hyperthyroidism. 2. Triggering factors: viral and bacterial infections; severe mental stimulation, such as frequent anger, excessive stress, sleep disorders, etc.; taking hormones, lithium, interferon and other drugs. Hyperthyroidism is recommended to go to the hospital in time.