My son fell from cycle last to last friday (12th Oct) he was the skin just bellow his knee bone was torn a little bit when visited the doctor on the day of accident he first gave me injection of TT & after cleaning the dirt on my wound dressed with gauze swab & betadine ointment injured area & told to remove & dress again every 2-3 days now he is out of town but my mom bought the swab, ointment & surgical tape & she does the dressing in my injured area but when I try to remove the swab at night the swab sticks to my wound & hurts very much so doctor please tell me what to put on my wound so that the swab doesn't stick? Even my doctor used to put a square thing on my wound so that the swab doesn't stick. Can you pls tell me what it is?