Trichotillomania (Hair Pulling) Support Group
Impulsive control disorder is the inability to resist an urge, temptation, or impulse, even when it may cause negative effects to the self or to others. If you or a loved one suffers from impulsive contorl disorder, join the community to find support and share your challenges with others who know what you're going through.

in fact, you did let go the hair once, you can do it again, and again :)
Try use something as a barrier to prevent you from pulling, like a hat, cap, hair-net or gloves..