What is it called ? does any one know?

Okai I am doing a solo dance for my gcse and we have to chose something to base it on , I wanted to base it on that adictions people get , its when they cant stopp pulling there hair out and they pull it out in big chunks and stuff, I have loads of...

dance movments I could use buh does any one know whats its called?
Its not alopecia bcoz thats when yout hair just falles out , I want to know the name fort the one where people cant stopp pulling it out ...
Can you please help me (: thanx

Trichotillomania:

Dealing with obsessive hair pulling is not an easy thing. People who suffer with trichotillomania often feel incredibly self conscious about their hair. Depending on the severity of their urge to pull, they can feel that their hair loss is too noticeable to allow them to participate in many of the everyday things that others take for granted like shopping or even going outside for a walk.

http://ezinearticles.com/?Obsessive-Hair-Pulling-Help---Trichotillomania-Treatmentid=1762876

Trichotillomaina

okaii thanx (:

trichotillomania. I have it and its horrible.