Long hair - falling out?!

Hi
Hope someone can help!
My hair length is between my shoulder and elbow, medium brown, hasnt been coloured for over 6 years so the whole length is natural now.
It used to be very thick when I was younger (im now 22), in the last few years it has been falling out alot. Not just your average amount, to the point of family & friends knowing that I will 'molt' all over their house when I visit! Balls of it come out when I comb my hair (i dont use brushes), in the shower, and throughout the day. I can run my fingers through my hair now and 10 or more hairs come out with it, constantly. All full length hairs too.
Im a bit stuck what to do, my hair doesnt visbaly look bad and theres no patches in particular that are coming out but it has definately got thinner. Used to be finger tip to thumb tip around the width when held together in middle and now its just over half of that. )-:
Any advice on what this might be and products that may sort this out would be MUCH appreciated!
Thank you
Jayd

Wash your hair once in a week. To keep your long hair healthy you need to go for oil treatment once in a month.

Women of all ages are wearing their hair long. There are many benefits connected to long lengths of hair. This hair is particularly flexible, when it comes to achieving a variety of styles. It easily provides casual and formal looks. Here are some of the most popular long hairstyle being worn today:

Side-swept looks are classic

You can wear a chic side-swept style with any type of apparel. It doesn