Diganostic criteria for hypothyroidism is based on symptoms and the results of blood tests that measure the level of TSH and the level of the thyroid hormone thyroxine. The high level of TSH and low level of thyroid hormones as known as free T4 level indicate an underactive thyroid hormone or hypothyroidism. When the thyroxine level is low, the pituitary gland produces TSH to stimulate thyroid gland to produce more thyroid hormone. TSH tests play an important role in managing hypothyroidism. They help the provider to determine the right dosage of medication, both initially and long term therapy. The treatment of hypothyroidism is thyroid hormone treatment therapy. The treatment goals for hypothyroidism is to normalize blood levels of TSH and
