Headcanon
Penny picks at the skin around her nails out of habit
it started when Ben died
sometimes she doesn't realize she's doing it
sometimes she'll go really deep on accident making it bleed
when May sees her doing it she holds her hand
When Tony finds out he asks May and whenever he sees her doing it he gives her something to tinker with or holds her hand
sometimes Penny will draw on herself instead of doing it
It started getting better
the after the snap it gets worse and she does it again worse this time
Sometimes it bleeds and she doesn't care
She starts picking at her arms
She tries stopping but she can't
Tony finds out and gets worried
she promises she can stop
when Tony realizes she can't he gets her help
Penny starts drawing whenever she wants to pick at her skin
she has a wall in the cabin full of paintings she works on whenever she has the urge