Aug 15, 20178 yr undermining and tunneling are caused by being dragged across the bed instead of being lifted. sometimes it will also be caused by infection. I have seen tunneling that leads to a abscess in a surgical wound. Undermining is the result of shearing which is when the skin sticks to the bed and the muscle and subq tissue moves and tears tissue, vessels. hope this helps!!
Aug 22, 20178 yr Author Thank you for responding back. My wound book didn't say how it was caused. Much appreciated!
Does anybody know what causes tunneling or undermining in a wound?