Dermatologist reacts to pimple patch removal It’s fun to watch pimple patches with a bunch of gunk on them being removed from acne, but a common misconception is that this gunk is pus being removed from a pimple. It’s not! Pimple patches are made from a type of bandage called a hydrocolloid bandage which is a type of gel bandage. When oil and moisturizer touch hydrocolloid, it transforms into more of an opaque gel substance which gives it the gunky color. Hydrocolloid bandages are helpful for pr