I've been punched and punched my bro a lot (sorry if it hurts you more than me) but it doesn't actually hurt at all or at least not that much. It doesn't effect if super light, only a little achy if medium, and only a tiny sting if hard. But, I'd imagine if it was in the head or some other... Precious parts... It's probably gonna cause some of those things. But if in the arm, thigh, lower leg, or side, see what stated above.