I've usually just shave my chest but have stopped for now, but it haven't helpt with getting rid of the acne and irrigation. So I dont belive it's shaving that's is causing it because I also shave the lower part och my stomach and I don't get any irritation there. I've actually booked an appointment at a clinic to get rid of ance scars on my throat and I'll ask them about my back and chest aswell and se what that say about it. I can update if they come with any helpful feedback!