Inny, when we get angry, adrenaline rushes through our bodies. We get the "flight or fight" response. Especially when others are fighting. I've noticed that sometimes when that happens, I feel sensations there as well. I haven't had the urge to hurt myself there when it happens, but I always feel like "why does this seem to affect that area???" It's almost like I'm getting aroused at conflict, and I feel like I shouldn't. So maybe that's why you have the urge to hurt yourself? Because you feel you shouldn't get feelings there when you're angry?