Well I bit the bullet and returned completing three weeks 2 treatments a week). I'm very skeptical but the Dr. said all my sensations are normal and good. this last ime the injections were more painful. Of course he said that's because sensitivity is returning. (we'll see) As far as I can tell by research, possible infection is the biggest risk. The doc say's he goes overboard disinfecting the injection sites. No one here has chimed in so I assume no one here has done this. It's a committment and time consuming.