It is normal to shed between 50 - 100 hairs a day, and sometimes even more depending on what you are doing such as shampooing/conditioning or brushing there can be even more loss. That being said, if you are seeing more loss than this it would be good to talk to your doctor because there might be something else going. There are several possible causes and why it is important to get checked by a medical professional.

http://www.webmd.com/skin-problems-a...ir-loss-causes