Most, but
not all thyroid disorders stem from disease. There are several that fall into
the 'most common' category, you'll find links to the left that will go into a
bit more detail.
It's very
important to determine the cause for your thyroid disorder, be it hyper or hypo.
It will make a difference in how you treat it with meds, diet and life style.
Never
settle for a doc that tells "you all is fine, your labs are 'within normal range'"
if you know that there is something wrong with you. Be assertive and stand your
ground, you are fighting - not only for your quality of life, but in some cases
for your very life.