The blister on my foot

I understand this is probably the last thing you want to read about but it finally got too odd I just had to tell someone about it. A couple weeks ago I got a blister on the bottom of my foot and since then it was a mass of dead skin with an air pocket. I popped the air pocket with a hot pin and now there is a mass of dead flesh on the bottom of my foot. Leave a comment telling me what you think I should do.