I am sorry to hear about the complication you are experiencing. These types of complications can be quite (understandably) distressing to patients; unfortunately, often the area will likely look worse before it begins to look better. The area of necrosis tends to occur where incision lines come together (where there is the greatest tension and least blood supply). Close follow up with your plastic surgeon will be very important; sometimes removal of exposed sutures and/or removal of any unhealthy tissue (debridement) will expedite healing. Timing for debridement will depend on how you are doing clinically; online consultants will not be helpful in this regard. In many cases, as long as there is no sign of infection, leaving the eschar in place ( which may serve as an "biological Band-Aid" may be the best course of action. This course of treatment may also help when it comes to avoidance of removal of healthy tissue during the debridement process. There may be different treatment modalities recommended; best to "stick with" your plastic surgeons recommendations. Generally, this will involve application of some type of sterile dressing ( in my practice I use a non-stick dressing covered by a sterile dressing once a wounded is clean). If/when an open wound is present, "wet to dry" dressing changes may be helpful when it comes to gently deriding the wound. It is likely that eventually you will end up with a wound that is "beefy red" (granulating) in appearance; at this stage, you will find that the wound will heal relatively quickly. These types of wound healing problems generally go on to heal over the course of the next several weeks (possibly months depending on wound size). Also important to concentrate on a healthy diet, including good protein source. Obviously, avoid nicotine, in any form, Sometimes (depending on the width of the open wound and the appearance of the scar in the longer term), scar revision surgery may be helpful down the line. Best wishes.