Hi..., In hypothyroidism, T4 is low and
TSH is high. This means the pituitary is sending more TSH to stimulate the
thyroid, but the thyroid does not respond. A low TSH indicates the pituitary may be the cause of hypothyroidism....
A common treatment is to replace thyroxine with a specific synthetic thyroid hormone (levothyroxine)....but determining the right dosage often takes time. ...Consult Endocrinologist....