There is no definite time limit for the seven tests, which can be performed at any time, but most hospitals will have patients have their blood drawn in the morning. The seven tests include TT3, TT4, TSH, FT3, FT4, TPO-Ab and TG-Ab. These tests are usually not related to food intake and patients do not need to take them on an empty stomach. However, if a patient is taking anti-hyperthyroid medication or undergoing thyroid hormone replacement therapy, the test results may be affected and should be scheduled according to medical advice. In addition, there are some patients who want to test the effectiveness of their medication, and the test time is not limited in this case. Patients who have undergone the seven tests should inform the doctor whether they have recently taken any medications to avoid affecting the diagnosis of the disease. At the same time, patients should pay attention to rest, regular work and rest, calmness and emotional stability before the test to ensure the accuracy of the test results.