Foam dressing made of polymer material (pu) foam dressing, the surface is often covered with a polyurethane semi-permeable film has self-adhesive and non-self-adhesive products. Advantages: 1.Surface semi-permeable film can stop the invasion of dust and microorganisms, etc., to prevent cross-infection Nantong University Hospital Stoma Wound Incontinence Care Clinic Yuan Baofang 2.Lightweight, easy to use, good compliance, can be suitable for all parts of the body; 3.Absorb a lot of exudate, reduce wound maceration 4.Keep the wound to keep moist, accelerate wound healing 5.Foam pad cushion external pressure, feel comfortable 6.Remove without Damage to the wound Disadvantages: 1, non-adhesive products need secondary dressing fixed 2, because of opaque, not convenient to observe the wound 3, can not be used for dry wounds, black scab wound