Depends. Ask your surgeon. This will depend on the type of breast surgery that you are having.
Ask your surgeon. Every surgeon has their own instructions. In general, the wound has one cell layer that seals the wound in 48 hours. If a waterproof dressing has been placed over the wound, then one can shower immediately.Keeping the wound clean is most important and good ole soap and water will do just fine. Call your surgeon to get specific instructions.
Ask Surgeon. Much will depend on exactly what procedure is performed and the specific surgeon's preferences. Therefore, these types of questions are always best addressed to your surgeon who knows your situation and is responsible for your care. Best wishes.