jenna marotta , 27 , suffered from dermatillomania , a psychosomatic disorder that caused her to obsessively pick at the skin on her face .
the new york-based writer said she used to spend up to four hours a day squeezing her skin in front of the bathroom mirror .
she developed the condition while trying to battle binge-eating addiction .
has now managed to overcome it - but sees psychiatrist ` to stay on track '