Large area of crusty sores on lower leg and need some suggestions

I have a large area of crusty and disgusting looking sores on my lower left leg. Had these for months, maybe a year now. Went to doctor who sent me to UW Dermatology clinic in Seattle to get a biopsy. They were able to tell me what was not causing it, but not what was causing it. It is a terrible ordeal to get there from my home in Auburn, WA and was hoping I could get rid of it myself. They determined it was not cancer, or any kind of infection, or anything serious. The ointments and instructions they prescribed hasn't helped much. It started to go away, but now has gotten worse and seems to be trying to spread. So i have been dealing with it the best I can. Oh I guess I should have started out by saying it started with leg and foot swelling and then the sores started to appear. Anyway it had been weeping before the biopsy, and that seemed to get better but now it is REALLY weeping so I can't walk without slipping in my plastic slippers due to all the liquid that falls into them. So, I had to bandage my leg up again. Anyway, in summary it looks terrible and seems to be spreading along with a rash I get from adult diapers due to incontinence, which, as far as I know doesn't have anything to do with it. But it seems to be getting worse also. I have noticed though that the swelling is quite a bit less than it had been. So maybe this is a good thing? Well, probably not. Hoping there is someone out there who has overcome such a problem.