One night my sister put Duofilm on her wart and put a band aid over it so she would not get her sheets stained and in the morning she removed the band aid and saw that around the wart it was red and her skin had peeled.It wasn't able to be covered with was about 8 millimeters wide and 8 millimeters long so it wasn't too big but it was noticeable.she obviously got it on her skin by accident but she wanted to know how long before it wouldn't be red and peeled.(how long its going to stay like that.)