Since my answer is very unconventional I hesitate
to mention it but we often overlook the possible emotional
causes of conditions we suffer.  In the book Heal Your Body by
Louise Hay she lists the probable causes of different ailments.
Under problems of the thyroid (all kinds) she lists:
Humiliation.  "I never get to do what I want to do.  When is it
going to be my turn?"
Another book that is more detailed along this line is Buried
Feelings Never Die.
-Joyce Mitchell

Mary-Margaret Coates wrote:
>
>      A woman about 35 was recently diagnosed with hyperthyroidism which
>      developed after her third pregnancy (children now 6 and 4 years, and 4
>      months).  She has taken 400 mg PTU/day for about six weeks, but still
>      has many symptoms, principally weight loss and extreme exhaustion. She
>      is concerned about her own debilitated condition, and wonders three
>      things:
>         a) can she keep up her milk supply in this condition?
>         a) what can she do to improve her own nutritional status?
>         b) will discontinuing breastfeeding help her to stabilize her
>            weight or ease the exhaustion?
>
>      Thanks for any suggestions!