i am eighteen years old and have noticed that my hair all over the top of my head and even on the sides to some degree has become finer. I already have naturally fine hair but it has gotten even more fine, however i still have a full set of hair. Does hair becoming finer always mean it is undergoing miniturization and balding or can it just be naturally occuring with age and not undergoing balding?
There is no clear way to tell without a physical examination and history. If you are miniaturizing rather than going to a finer hair, the regularity of the mapping will tell. Real miniaturization will have variable hair shaft widths while a change to a finer hair will show complete regularity in hair shaft widths. A fine hair can undergo miniaturization.