Do you have any other symptoms ? Weight loss, weight gain ? Anxiety ? I started losing my hair when I was in my late twenties along with other symptoms. Come to find out I had an over active thyroid.I was surprised to find out that my birth control pills was causing this because they was putting too much estrogen into my system. Check with your doctor on this especially if you are on birth control.
I was told to take a multivitimin and to use Rogain, plus I took extra vitimin E.
Good luck !