How to get rid of trichotillomania? PLZ HELP!?

Hi, im 13 and i have trichotillomania. its an adiction to pulliing out your hair. everyday, i pull out my leg hair with tweezers, and i dig under my skin just to get the hairs. i have alot of red spots and scabs all over the bottom of my legs from this and i cant stop! and now in the summer i cant wear shorts or anything cuz i dont want people to see m legs! can someone help me get rid of my trichotillomania