A lip flip is a term commonly used for a procedure involving small amounts of botulinum toxin around the upper lip. It temporarily reduces activity in selected muscle fibres, allowing more of the natural upper lip to remain visible. As botulinum toxin is a prescription-only medicine, suitability requires assessment by an appropriate prescriber.

How is it different from lip filler?

A lip flip does not physically add volume to the lips. It changes the activity of muscles surrounding the upper lip, while hyaluronic acid filler adds volume and can alter lip shape and definition. The most appropriate option depends on lip anatomy and individual concerns.

An assessment may be appropriate when the upper lip rolls inward or becomes less visible during smiling. However, not every concern is caused by muscle activity. Lip structure, existing volume, smile dynamics, medical history and potential treatment risks must all be considered.

What are the possible limitations?

The effect is temporary and may be subtle. Because the muscles around the mouth are involved in speaking, drinking and lip control, treatment can sometimes cause temporary difficulty using a straw, pronouncing certain sounds or maintaining normal lip movement. Results and side effects vary.