What is the best treatment for an allergic reaction to surgery tape after breast augmentation? (4 weeks po)

I had ba four weeks ago and at my two week post op follow up, when the tapes were removed from the incision site, I developed an allergic reaction. I was told by my ps to purchase cortisone cream. I purchased the cream and used twice a day and the rash did go away from the incision area but I have recently started the itch in the center (between my breasts) I have been putting the cortisone cream but it is not working. I have an appt scheduled today with my ps but id like to get different opinions.