Welp I do the same, my fingers just get digged into my skin without me even noticing. Plus when I'm super anxious I feel like vomiting, so I dig hands into my skin. I always dig them on my shoulder and thighs because I hate shorts and most of my outfits have sleeves. When I'm alone and I need to vent, I squeeze my arm so tight that it hurts- a lot. Bad habits bad habits