I have yellow like skin underneath a scab from my breast reduction. Is it an infection? (Photo)

This area (the inverted-T region) of the breast reduction or breast lift incision pattern is a common area of decreased circulation and therefore slower healing. This usually goes on to heal without much ado, but there will be slightly more scarring (which can be revised under local anesthesia later, if desired). If you're a smoker and haven't stopped (or have restarted), this can cause decreased circulation (nicotine is a potent vasoconstrictor) that can lead to dead skin and wounds coming open. STOP NOW! This includes second-hand smoke, since the nicotine doesn't care whose cigarette it came from. E-cigarettes also. This area didn't break down because of infection. Less-than-perfect circulation simply caused delayed healing and partial skin loss. This led to the scabbing, and what you see now are the deeper layers of the dermis (yellow-white) over which new skin will have to grow.But, an open wound needs to be kept clean so it doesn't become infected, because that CAN lead to wound breakdown or incisions opening up. So, see your doctor and make sure that proper wound management is being advised; keep this area clean and relatively dry (too-soft tissues under tension can come apart if healing is not far enough along yet), and don't over-exert.This should be just fine, but check with your doctor as soon as possible. Best wishes! Dr. Tholen

It's hard to tell from the photo, however, it does not appear to be infected. This is a very common place for the incision to experience some superficial "dehiscence" or breakdown, due to the tension on the incision there. I would see your plastic surgeon at your earliest convenience for a full exam and reassurance.