Anti-wrinkle injections are applied to the lower face to treat:
Gummy smile: Some people may find that too much gum shows when they smile. This is most common on the top lip and is called excessive gingival show in medicine. You can fix this in many different ways. The most common way to stop the muscles around the lip from pulling it up is to make them weaker and softer.
Chin: If the chin is set back (receded), it can make the face look crooked. The treatment might help relax the muscles that pull the chin back. This lowers the face and makes it look like the person is more at ease. Our lower face skin starts to sag as we age because it loses its flexibility, and gravity pulls on it.
Jawline: Injections into the Platysma, which is behind the jaw muscles, can help reduce slack and drooping of the jawline by relaxing the muscles there.
Marionette lines: are lines that go down from the lip. A toxin and skin fillers can be used together to treat this. The toxin will ease the muscles that are pulling the skin down. This will help the skin come back up. Dermal fillers might be needed to help even more with the deeper folds.