The pituitary gland controls the amount of hormones released from the thyroid gland, so the apparent dysfunction of the thyroid gland could be caused by damage to the pituitary gland.

The pituitary gland is a vulnerable gland in the brain and is exposed to any blunt force trauma.

This would be my suggestion for your thyroid problems.

There is more on the subject here:

http://www.endocrineweb.com/conditio...-thyroid-works

-GlassHead