3.  an overactive thyroid; a
condition in which the thyroid
gland produces too much of
the hormone thyroxine
Causes:
Grave’s disease
Thyroiditis
Several treatment options:
 anti-thyroid medications
and radioactive iodine
surgery
Hyperthyroidism

4.  underactive thyroid; a state
in which the thyroid gland
does not produce sufficient
amount of the thyroid
hormones
Causes:
 Iodine deficiency
Hashimoto’s thyroiditis
Treatment:
 Synthroid
Hypothyroidism