If you haven’t already, work on identifying not only what triggers this behavior, but the specific locations and time of day you typically engage in it. That way, you can develop strategies to modify your actions and have a heightened sense of knowing when you really need to distract yourself from the impulse.
When you feel the urge, try to find other things to do that will really keep your hands busy. Squeeze a stress ball or play with some Silly Putty. I don’t know what your hobbies are or if you’re male or female, but you could knit, paint your nails, do some bead work and other arts and crafts like origami or scrap booking.
Try taking up a few new hobbies that will need your attention and last a while – gardening, for example. Trichotillomania and other forms of self-harm are coping mechanisms generally in response to stress, anxiety and/or depression. You need to find a healthier way to deal with the emotional distress (I’m assuming) that is causing this compulsive behavior.
If you explore and experiment with new hobbies and projects to take on, there’s no doubt that you’ll find something you love that will help lesson your urge to pull out your hair. Cooking, sports, writing, exercising, meditation, etc. You can find some links online about meditation and breathing techniques that might help you when you’re stressed or anxious.
I know everyone values alone time, but for now, put yourself in scenarios where you’re not alone, just for the sake of not wanting to pull out your hair in public. For example, study at the library rather than at home. Watch tv with the family rather than in your room.
Try setting goals for yourself. I don’t know how often you pull, but tell yourself that this week you will only pull five times. The week after, you will only pull 4 times. And so on and so forth.
Anyway, I wish you luck and I hope things get better for you! (hugs)