One time I am pretty sure I needed stitches, because it would not close, it was about a half inch wide. I cut on purpose but did not intend to go that deep. I showed my parents and they refused to take me to the ER, because they didn't want me to be hospitalized. My dad wrapped my arm in duct tape and sent me back to bed. It never closed, so I have a very wide scar there now. Whenever I look at it, I think about how my parents didn't care enough about me...