There is difference between hair thinning and hair fall. If you noticed hair gradually thinning over months or years, female pattern hair loss is the most likely diagnosis. If however, there is an increase in the hair fall of >100 strands, that is significant and there are a number of conditions that can cause this and this often warrants further investigation to look for the underlying cause.
Dermatologists specialize in the treatment of skin and hair diseases and you can consider seeing a dermatologist for your concerns.
