Hi & Welcome to HCM.
Incomplete data like age, gender, any associated illness or symptoms?
However, I have gone through the question and understand your concerns.
Regarding the
hair fall, it is a side effect due to
Synthroid which commonly occurs during the first few months of treatment. This effect is usually temporary as your body adjusts to this medication which can be minimized by either multivitamins with minerals like Zincovit or use of
Minoxidil drops or lotion.
Since you have started loosing your hairs after one year of therapy, it could be due to other causes such as androgenetic
alopecia, deficiency of calcium or other minerals, or anemia.
I, therefore advise you to
consult a dermatologist for proper evaluation to rule out any underlying cause and effective treatment which may also involve use of Minoxidil lotion with Multivitamins including Biotin.
Hope this will solve your problem.
A feed back is appreciated.