Facial fillers also known as dermal fillers are a naturally-occuring hyaluronic acid gel that is injected into the face to smooth wrinkles & folds (especially around the nose & mouth). …
Facial Fillers (Enhancement)
Derma fillers are used to treat forehead lines that are a little deeper. These are soft gels that are injected into or under the skin.
They basically work by pushing the line outwards and so help to 'plump up' the area where they are injected, making the skin look more even.