Thanks for the query.
Do you mean to ask the "cause" for an underactive thyroid?
Or the "course" of the under active thyroid?
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i mean the course, what courses this problem.
not for me, but yes the person is on thyroxen , but wants to come off it.
because of negative side effects , head aches feeling tied andmoodysorry this is takeing so long but i need to call her each time to get theright answers.