What is the name of the procedure to inject substances into the lips for volume?

The procedure to inject substances into the lips to add volume is called lip augmentation.

Lip augmentation is a cosmetic procedure intended to enlarge the lips, improve symmetry, define the vermilion border, or adjust the proportion between the upper and lower lips. It may use injectable dermal fillers, fat transferred from another part of the body, or implants. Hyaluronic-acid fillers are among the most commonly used modern options because they can create temporary volume and may be adjusted or dissolved by a medical professional.

The history of lip augmentation includes early attempts with paraffin around 1900 and liquid silicone injections beginning in the 1960s. Injectable bovine collagen became an important option around 1980, although it required allergy testing and produced relatively short-lived results. Modern treatments generally cause temporary swelling, bruising, redness, or tenderness. Lip augmentation is different from a lip lift, which surgically changes the distance between the nose and upper lip without primarily injecting a filler.