Wrinkle relaxer is a form of muscle relaxant that decreases expression lines, and is mainly used on the upper face for frown, forehead and crow’s feet lines. On the other hand, dermal fillers add volume to the face through the injection of a solution deep into the dermal layers of the skin. They are used to reduce static lines in the mouth and cheek areas and can even be injected on the top of the bone, cartilage and tip of the nose to give it a youthful boost.