Normal T3, low T4 and high TSH are signs of hypothyroidism, but the diagnosis cannot be confirmed yet. Patients should go to a professional hospital for systematic examination of thyroid function indicators and thyroid ultrasound, and seek professional medical advice on medication according to their physical condition and recent clinical performance. If a diagnosis of hypothyroidism is made and medication is used, this result indicates that there is a problem with the amount of medication used, you can have the three indicators rechecked in a few days.