It's called Trichotillomania. I had a friend when I was in high-school who suffered from the illness. If anyone is interested there is a 32 page .pdf file about the illness that can be downloaded at:

http://www.oup-usa.org/sc/0195149424...9424_intro.pdf

As for my advice, Bella, I would suggest finding as much information as you can about the disorder, and learning about it, then working from there. As well, speaking to a trusted friend, or a Therapist, can help you to vent any frustrations you may feel in regards to your situation. Both of these things can help you better understand yourself, and the possible reasons why the behavior exists.

You are not alone, especially not here, where we all have unique, and individual ways of dealing with stress.

(((((BellaBlue24)))))

In the meantime, please do not be too hard on yourself, realize that you are special and unique in your own ways, and that you can always come here if you need to vent, or seek advice. ^^

Take care.