I would advise getting some ointment from the Doctors such as bazuka that can be bought over the counter. Apply as directed this solution burns the varucca when dead skin forms remove with pumice stone and apply more solution. Best check with doctor first I have no circulation problems in my feet or anything else so this is the method I have used on myself years ago and repeated on my kids.
The hardest part is finishing the verucca off a chiropodist demonstrated this to me years ago and sliced the roots off with a scalpol on 5 I had. On my kids I used a sterile swiss armly blade and the attached tweezers along with bazuka solution to clear their feet within a few weeks.
Remember to follow the doctors instructions and also they do go on their own eventually with no treatment.