Hi my husband has a grey discolored area on this back, and when i squeezed the skin white pus came out. I bought polysporin rubbed it on 2 to 3 times a day for 1 week, I checked it for a week nothing came out, and now more pus is coming back. The smell is very foul, and now I'm not really sure what to do. He told me it has 2 to 3 years that he has a "weird feeling " in that area but no pain. What do you think, I was thinking of buying ichthammol to draw out all the pus, but I'm not sure if it will help if it's an infection.