Hello,
Triamcinolone acetonide is a potent steroid cream and it is not used for MRSA infection which is a bacterial infection. For MRSA ( methicillin resistant staph
aureus), potent antibiotics are needed which are sensitive to the MRSA infection.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your dermatologist. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.