In most cases skin and tissue necrobiosis is due to a circulatory disturbance of the veins, mentioned at bleeding. Rarely, a serious, bacterial infection may cause it. It may occur at abdominal plasty, breast reduction operation and breast-lifting. When confronted with skin necrosis, it is best to wait until the dead skin / tissue separates from its surroundings, because the area which seems involved in the necrosis may become smaller later as a result of some tissues' 'survival'. This process may take weeks. We need to wait so long, because many times the dead, removable area becomes smaller than it seemed in the first weeks.
There might be a need for secondary operations, tissue supplementation or scar plasty.