Well, I agree with AnneinNC ... there is NO INFO online about this and I searched extensively. I looked all over this site too.
I am happy to report that my wound is now finally all healed. I want to let everyone know how I did it. (CarolineEF comes closest to what worked for me ... I don't know if that was from your own experience Caroline or if you are a practitioner.)
What I observed was that my wound was infected. The infection slowly moved out from the initial wound and affected a gradually increased area around the wound so the wound simply got bigger and bigger.
I noticed that if I simply put an antibiotic all over the wound, it didn't help. All the while I was trying to keep it away from water. WRONG! One day I just let the warm water from the shower flow onto the wound. It felt good too. But when I got out of the shower I noticed the scab was loosened. So I scraped all the scab off with a cotton swab soaked in antiseptic peroxide. GOOD MOVE! It did not hurt but the scab easily came off. I also squeezed all the pus out as best I could (there was even pus under the distant surrounding skin). Thed I dried it with a clean antiseptic soaked cotton followed by a dry cotton swab. Then I used Neosporin on the raw wound ... just put a dab on there and rubbed som all around the wound area. Early in the process, there was enough drainage below the scab that it sort of "floated" off. Later I had to apply more force to remove it.
I repeated this every day: soak in warm water, remove scab, squezze out extra pus, disinfect, dry, Neosporin. And sure enough, every day the scab came off, the wound below was smaller. I also moisturized the skin around the wound because I noticed it had gotten dry with even some dead skin left over.
I think the key to the whole thing was removing the scab and squezing out the pus even from the surrounding skin. I thin it was the growing unremoved pus and infection under the surrounding skin that made the wound just get bigger and worse over time. Getting the pus out by removing the scab was the key. Sounds gross. But it worked! It was there for three or four months.
I'm looking at the affected area right now and it is completely healed. However, there are residual marks on my skin which I think were the result of me not figuring it out sooner and the surrounding skin was thus getting damaged by the infection and pus spreading outwards. Anyway, the marks are fading away now. I'm just sorry it took me so long to finally get it figured out ... the damaged area ended up 1-inch in diameter ... that's the size of the mark now on my shin! Thank god it is fading.