Hi Doctor, My son has a callous on his foot about the size of a dime and it s hard and changes colors from a light green to a bright red at times, I have taken him to the doctors office and they did a treatment where they freezed the area and scraped off some of the dead skin, however he says now it is red and swollen and very painful to walk on , because of my insurance now I cannot afford to continue to take him to my doctors office due my out of pocket cost and high deductible. Can you offer any other suggestions?