Dermal Fillers work by stimulating the production of collagen (connective tissue) and essentially plumps the skin in injected areas. It binds to water helping to retain softness, moisture, and adds volume to desired areas.
As we age, we lose volume in our face and this can cause the appreance of looking older than we actually are and feel.
Fillers help to literally "fill" in the areas the have lost this volume and also help to soften appearance of lines around the mouth and hollow areas under the eyes for example.
This can take up to 10 years off of the way you look in just one appointment!