So what is the reason why the dilator is exposed? Shijiazhuang Xingyuan plastic surgery experts tell you. Causes of dilator exposure 1) Improper incision selection. If it is located on the unstable scar surface, the dilator is too close to the incision or the dilator moves under the incision, which may lead to poor wound healing. 2) Skin necrosis is caused by superficial desquamation or damage to major blood vessels on the surface. 3) The dilator is not unfolded and folded into an angle. 4) Too much water injection at one time will block the blood circulation on the skin surface. This is the most common cause of dilator exposure. 5) If the pre-injection pot is too thick or too tight, it will compress the surface skin and make it necrotic. 6) Infection and hematoma affect wound healing or secondary surface skin necrosis.