A bulge at the back of the neck is more likely to be due to a subcutaneous lipoma or fatty accumulation. The most effective treatment is surgery, usually under local anesthesia, to remove it. Since the skin at the back of the neck is tougher and the fat layer is thicker, there is a tendency for secondary injuries, usually vascular injuries, to occur during surgery. In addition, postoperative fat liquefaction is also likely to occur, so if necessary, full sutures of the skin and subcutaneous tissues or drainage strips can be chosen during the operation, and after the operation, attention should be paid to regular drug changes, prevention of infection, restriction of neck activities, regular drug changes and stitch removal, because some patients, too, are prone to delayed healing of the incision. If there is no discomfort, continue observation.