It depends on who is doing it...how much pressure is applied and how deep the puncture tool goes. There are puncture tools for diabetics that are extremely prec

It depends on who is doing it...how much pressure is applied and how deep the puncture tool goes. There are puncture tools for diabetics that are extremely precise in that they only puncture as little skin as possible. These don't hurt. I had various nurses as a child and the pressure/closeness the puncture tool was applied with, matters more than anything. With any puncture tool, if its already being pushed into flesh, ie. skin is forming a valley, its more likely to cut through deeper layers due to the compression.