Lip fillers are injections that add volume to your lips. They’re a type of dermal filler.

Lip fillers consist of synthetic hyaluronic acid (HA) — HA is a natural substance in your body. Many people who get lip fillers want to increase the size of their lips. You might want to enlarge the size of your lips for many reasons, including:

• Restoring a previous lip size. As you age, your lips may get smaller or thinner, your philtrum (the groove between your upper lip and septum) may get longer and flatter and the distance between the corners of your mouth (intercommissural distance) may increase.
• Correcting the shape of your lips. It’s common for your lips to be different sizes or shapes (asymmetrical).
• Smoothing wrinkles. When you smile or laugh, wrinkles sometimes develop on the sides of your mouth.
• Boosting confidence. Lip fillers can help improve your self-esteem and body image.