Cosmetic fillers, also known as dermal fillers, are injectable treatments that can be used to add volume, smooth out wrinkles and fine lines, and enhance facial contours. They are made from a variety of materials, including hyaluronic acid, collagen, and calcium hydroxylapatite.

Some common uses for cosmetic fillers include:

1. Smoothing out wrinkles and fine lines:
   Fillers can be used to fill in wrinkles and fine lines around the mouth, eyes, and forehead, giving the skin a smoother, more youthful appearance.
    
2. Adding volume to the lips:
   Fillers can be used to add volume and definition to the lips, creating a fuller, more attractive appearance.
    
3. Enhancing facial contours:
   Fillers can be used to enhance the contours of the face, adding volume to the cheeks, chin, and jawline for a more defined, sculpted look.
    
4. Correcting asymmetry:
   Fillers can be used to correct asymmetry in the face, such as uneven cheeks or lips.
    
5. Restoring volume to the hands:
   Fillers can also be used to restore volume to the hands, reducing the appearance of wrinkles and giving the hands a more youthful look.

Cosmetic fillers are a minimally invasive treatment that typically takes just a few minutes to complete. Results can last anywhere from six months to two years, depending on the type of filler used and the area treated. It is important to choose a qualified and experienced provider to ensure the best possible results and minimize the risk of complications.