In addition to the symptoms of hyperthyroidism, laboratory tests, such as thyroid function, including thyroid stimulating hormone, thyroxine, free T3, free T4, total T3, total T4, etc., are needed to determine if the patient is truly hyperthyroid, for example, inflammation of the thyroid gland can also cause transient hyperthyroidism, and thyroid ultrasound or iodine uptake is routinely performed. The iodine uptake rate increases in the presence of hyperthyroidism, which, when combined with the manifestations of hyperthyroidism, confirms the diagnosis of hyperthyroidism. If the iodine uptake rate is low, thyroiditis is more likely. Therefore, in clinical practice, in addition to the clinical manifestations of hyperthyroidism, palpitations and shortness of breath, combined with a thyroid function test, we can determine whether a patient has hyperthyroidism.