The ditch is a pain to heal. I would highly recommend using Dermalize for this area making sure the area is properly cleaned and dry before applying. It can be left on for a few days. This forms a barrier allowing it to heal without and nasties coming into contact with it and it feels so much more comfortable when bending, sleeping, showering etc. Most other areas heal fine with some cling film initially and then good hygiene but the Ditch...! Needs some extra TLC.