Breasts have turned highlighter yellow color? Its my 5th day from having surgery. (photo)

It certainly is the later stages of bruising.  Meaning that some of the blood that may have been apparent under the skin has now been absorbed and is turning the skin the color you see.I would just follow up with your plastic surgeon to make sure everything is going in the right direction.Hope that helps.

hello canadeah Swelling and bruising will subside during the first week after surgery and will be controlled by pain medication. The initial surgical tapes will be removed a few weeks after surgery during a post-operative visit. Patients typically may return to a work a few days after surgery (only a light workload during the first two weeks). Showers are permitted on post op day #3 if there are no drains. #post-op #lift

That looks like typical bruising that you see after surgery.  It is common not to see it until a few days after surgery because it takes a few days for the blood to come to the surface and change colors (break down).  Follow up with your surgeon if you have any concerns and best of luck.