text_1: If you have a high thyroid stimulating hormone (TSH) and low free thyroxine (T4), do you need to do any workup like thyroid antibodies or can you just treat?  Consider temporary condition like thyroiditis?  Follow them up for regaining thyroid function?
text_2: If you have a high thyroid stimulating hormone and low free thyroxine, do you need to do any further workup?