Hope all goes well for you Dr D, I can remember posting some time ago about getting infected spots on the inside of my thighs before I started wearing kilts more regularly.
Good luck with your problem, but I wonder if barrier nursing is the answer. While I don't know all the details would it be a feasible option to use something like Opsite to seal and seperate the 2 areas, so giving them time to heal seperately.
Cheers Rhino