How does "Draw Salve" or black cream work? And how long does it clutch?

About a month ago I felt approaching I stepped on somthething. A few days later I get a small hard blister-bump on my inner bottom restore to health. I thought it was a spliter or a bee sting but as a week go by it got bigger. Another week go by and I tried to take bad some of the hard outer skin, to see if I could tweeze something out but it I freshly made a small hole in the bump. Now that I've walk on it for a month its shifted and more to the side of the heal/foot! I bought Draw Salve and have be using it for a day and a partly. I don't know what I'm supposed to be looking for?... do I leave it alone and see if the bump go down or do I look for something that I need to extract out of my foot? If anyone have any info or tips I'd appreciate it... And Yes, I know I should've gone to the doctor...How does "Draw Salve" or black cream work? And how long does it clutch?
The stuff you are using is very dicey. On quackwatch there are pics of society that used that salve on their face to remove moles. The black salve removed the entire trunk and these people required extensive plastic surgeries to re-erect their faces. Take the stuff and pitch it and budge see a dermatologist.
Drawing salve is used to bring a boil to the surface. Stop using and see a doctor ASAP!