A lip flip involves injecting small amounts of Botox into the upper and lower portion of the orbicularis oris muscle, which encircles the lips and is responsible for the movement of the mouth and lips. This temporarily relaxes the muscle in your upper lip, causing it to roll upward slightly creating a poutier look. GREAT FOR GUMMY SMILE ; for those whose upper gums are exposed during a smile.Also great for those who aren't ready to commit to lip filler. Gives a natural, settle pout.