Recently I had an email correspondence with Dr. Grossbart, whom I know since he agreed to give an interview on the topic of Dermatillomania for SkinPick.
He let me know that he recently written some blog posts on Psychology Today. I really appreciate Dr. Grossbart and his approach for the treatment of skin problems. You can find his blog here. Although he writes about treating skin problems in general, and not necessarily about Dermatillomania, he devotes major part of his practice to helping skin picking and trich patients.