An adhesive bandage, also called a sticking plaster (or simply plaster) is a small medical dressing used for injuries not serious enough to require a full-size bandage.The adhesive bandage protects the wound and scab from friction, bacteria, damage, and dirt.An adhesive bandage is a small, flexible sheet of material which is sticky on one side, with a smaller, non-sticky, absorbent pad stuck to the sticky side.