Hello there and thank you so much for your question.
It is not uncommon to see this after breast augmentation after all you may have had dressings on the wounds for a while and the skin would not be subjected to the normal mechanisms of removal of dry skin flakes etc. The wounds may also still be tender at this early stage though if tender but also red hot and discharging then that might indicate infection but that does not apply to yourself.
Personally I would be happy for my patients to apply any bland non medicated non perfumed moisturiser and also commence very gentle scar massage but I would check with your surgeon that he or she is happy with this as most surgeons have a protocol of looking after patients and their wounds after surgery that is often quite individual.
I hope that you found this information helpful and my very best wishes for your continuing recovery towards an excellent long term outcome.