Hyperthyroidism is hyperthyroidism, if you simply check the thyroid function, usually do not need to fasting blood, hyperthyroidism patients with liver function abnormalities, need to check liver function, need to fasting blood. Hyperthyroidism is mainly due to excessive production of thyroid hormones, and the clinical manifestations are hyperphagia, emaciation, palpitations, sweating, agitation and irritability. Diagnosis of hyperthyroidism requires a complete thyroid function test. Given that diet generally does not affect the level of thyroid hormones, the blood test does not strictly require fasting. If liver function is impaired in patients with hyperthyroidism, liver function tests are needed, and blood is drawn on an empty stomach. In addition, thyroid ultrasonography can be perfected to clarify whether there are nodules and other conditions in the thyroid gland, which to a certain extent helps to find the cause of the disease. Currently, the commonly used drugs for treating hyperthyroidism include methimazole and propylthiouracil. Specific medication should be administered under the guidance of a specialist and should not be used without authorization.