I can speak from on who knows. I have had a thyroid condition since like forever. I was treated for over active thyroid desease in the 80s and was put on synthroid. Ever since I have a lot of hair loss. My point is that there are many medications out there that can cause hair loss. Just part of the effects that it has. It's like giving up one for the other. Fortunatly, I had hair enough for an army. So, it's no big thing to me. But, my hair grows so fast at on time about it was about two feet long. Then I had it cut to shoulder leangh. Now it is about three inches below my shoulders.
So, if you are on any medications at all, it could that.

~Carrie~