Have you had your thyroid checked?
Could be from some meds too?

You may be serum iron deficient.
First indication is widening of the parting
Many heart medications cause hair loss as well

Have you had your thyroid checked?

Ask your dr before taking, but
I found that using Biotin helped mine shed noticeably less. Not completely but enough. (Everyone different ) Have to be patient as it doesn’t work overnight. I think I noticed it on my 2nd month? Can’t remember.
Hope it helps.

I lost my hair by the handful about 5 months after being diagnosed. It has started filling back in now. It’s been a year since I was diagnosed. I believe that the changes in my diet played a significant role in my hair growing back