Certain sections of the skin are simply more sensitive than others. Serious tattoos applied to the chest, ribs, hands, or feet have a well-earned reputation for being exceptionally painful. Don’t be afraid to ask for a break if you need it. It’s a good idea to have a snack to pump those glucose levels back up. Don’t slip out of the zone any longer than you have to, though. Too many starts and stops will make your skin swell and slow down the work. You’ll also exhaust your body’s finite reserves of adrenaline.