I had a blistered rash between my toes that itched badly in June from a hotel shower. The doctor gave me ointment to stop the itching and eliminate the blisters, however, the itching remained. Recently, I began putting the ointment on the ball of my foot where the itching was most intense and 20+ internal blisters or bubbles surfaced below the skin. They itched badly so I was using a callus scrapper the pull away the skin and get the blisters to surface. Recently, I scrapped too much and several blisters popped. Now the ball of my foot hurts and, when I put peroxide on it, it bubbles showing lots of open scrapes and blisters. What is it and what do I do? I was putting hydrocortisone cream on it which stopped the itching and brought the bubbles/blisters to the surface but still internal mostly.