I have plantar tumors in my insteps of both feet. They did fill the hollow of my foot until I started taking Borax orally a few months ago.
I had been taking pics of my feet off and on to see where they were at growth wise. I have already had elimination of pain and can now see the reduction in the size of the tumors. They get soft first then they sort of just melt away. I'm over 2 years into the growth of the tumors so I suspect it could take 3-6 yrs to get rid of them.