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

If hydrocortisone cream is not working There are stronger topical steroids available(Temovate). Severe cases might require systemic steroids but on balance this is only rarely necessary.

Removing the tape and using a topical steroid usually resolves allergies caused by surgical tapes.  Often, a stronger prescription strength steroid is needed.  However, since this itching and rash are new and now between the breasts, this may not be the same tape allergy.  It is possible that this is a heat rash or a mild fungal rash.  Your surgeon should be able to help you sort this out and prescribe a simple solution.  Best of luck.