LaitLena- I hope your situation has improved since you posted your question. Although it is difficult to give you advice without seeing the actual lesions/bruises on the skin, but it does sound as if you either had a reaction to the tape that was placed after surgery, the skin scrub/cleansing solution used or even an allergy to the latex in the bra or surgical materials used....If the rashes/bruises were elsewhere on your skin, from head to toe, it might have been an allergy to a medication.
In any event, you sought out the best advice, your Plastic Surgeon. He/she knows you and your case the best. If the areas do not resolve with the treatment prescribed, I would have your surgeon recommend a trusted Dermatologist for a second opinion.
Good luck and I hope everything has resolved!