Hypothyroidism generally refers to hypothyroidism, and blood tests for hypothyroid patients usually do not require fasting. Blood test is an important basis for the diagnosis of hypothyroidism. According to the indicators of serum thyroid stimulating hormone, total thyroxine and free thyroxine in the blood test, the type and cause of hypothyroidism can be determined. Fasting is usually not required for hypothyroidism blood tests. However, since patients may need to undergo other tests at the same time, it is recommended that they go to the hospital in the morning. It is recommended that patients with hypothyroidism go to a regular hospital and cooperate with the doctor’s examination program. Please consult your doctor promptly if you feel unwell during the treatment.