Marionette lines are facial wrinkles that run vertically between the mouth and chin and can also create sagging in the lower half of the face. They derive their name from marionette string puppets, known for their split-jaw appearance. Like other fine lines and wrinkles, marionette lines are caused by the natural loss of collagen and elastin due to ageing. Collagen and elastin are essential proteins that keep the skin healthy, strong and youthful-looking.

Marionette lines tend to develop before other signs of ageing, as the skin around the mouth is thinner and more susceptible to change. External factors, such as sun exposure, stress and a poor diet, can also accentuate their appearance, making effective marionette lines treatment an important option for many.