My eyebrows are thinning and falling out I’m only 28 can my dermatologist tell why this is happening ?

no, they do that because of the ways we sleep on our pillows

use castor oil daily on them it will help them grow faster

go to your doctor first and see if they help. if not go to a derm

You should see your doctor - you'll most likely need blood work (and be sure they check your thyroid).  The Dermatologist is also a doctor - but they don't usually draw blood there - so seeing your Primary Care Provider is probably the easiest.

I’m sure they can. A Dermatologist is a licensed physician after all.