I have to agree with the flagyl suggestion. I have seen necrotic and also fungating wounds with terrible odor. Flagyl powder neutralizes the odor and also I have seen it help with the drainage associated with these wound. It comes in many ways, although, I use Flagyl 375mg caps and open them and sprinkle powder directly into wound bed. Another thing that might help would be gauze moistened with acetic acid solution. Good luck!!!