I have a blister , I was wondering if I
Hello and welcome to ask a doctor service. I have viewed the image and gone through your query.
It is a friction blister due to excessive walking. I suggest you to use a topical antibiotic ointment e.g either Neosporin ointment or Mupirocin 2% ointment, twice daily for a week. It would flatten, dry and peel off itself in a few days. Avoid puncturing it. Avoid walking as much as you can.
Hope I have answered your query. Let me know if you need any more assistance.