Blood tests for thyroid nodules mainly include the following four aspects: 1. Routine blood tests to check for infection and hemoglobin levels in the patient’s blood to see if the patient is anemic. 2. Checking thyroid function to check for various hormones in the thyroid gland to see if the patient is suffering from hyperthyroidism or hypothyroidism. 3. 4. Check the coagulation of the patient to see if the coagulation function is abnormal.