First, when I get stressed or angry, I'll bite my lip. Never hard enough to draw blood, but as hard as I can without doing so. If they're chapped, I might stretch my lips until there's a crack and they bleed a little bit. Also, and this is kind of gross and embarrassing, I pick at my acne. If I really want to SI, like I do now, sometimes I'll rub the skin of my wrist against the edge of a table.
Could any of this be considered SI, and therefore maybe even a slip-up?
