Repeated episodes of hyperthyroidism harm, specifically: 1, hyperthyroidism crisis: hyperthyroidism patients in trauma, surgery, serious infections, pregnancy and other stress states, easy to induce hyperthyroidism crisis, hair hyperthyroidism crisis when the patient appeared to have a high fever, the body temperature can reach more than 40 ℃, accompanied by severe tachycardia, sweating, severe nausea, vomiting, diarrhea, the emergence of all types of tachyarrhythmia, resulting in heart failure, the serious cases will be Shock, or even death; 2, hyperthyroidism heart disease: repeated hyperthyroidism episodes, can cause hyperthyroidism heart disease, hyperthyroidism occurs when the heart to catecholamine sensitivity increases, cardiac output and cardiac contractility increases, at the same time due to the expansion of peripheral vascular, afterload reduction, will also cause increased cardiac output, sustained high cardiac contraction, will produce hyperdynamic heart failure, in addition to hyperthyroidism patients easy to appear In addition, patients with hyperthyroidism are prone to tachyarrhythmia, such as atrial fibrillation, which is also one of the important causes of heart failure. 3, harm in pregnancy: repeated hyperthyroidism episodes during pregnancy can lead to patients with pre-eclampsia, pre-eclampsia, placental abruption and so on. 4, infiltrative synophthalmos: Severe hyperthyroidism can cause infiltrative synophthalmos, and severe synophthalmos can lead to patients with corneal ulcers, and even blindness. 5, hepatic and renal impairment: repeated hyperthyroidism can cause liver and renal function damage in patients. Repeated hyperthyroidism can cause liver and kidney function damage. At present, the clinical treatment of hyperthyroidism includes medication, iodine-131 treatment and surgery. Once the diagnosis of hyperthyroidism is made, the patient should immediately standardize and carry out comprehensive treatment.