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By Jillian Caldwell, MS, PA-C

Published 2026-05-15

Lip Flip in Houston

A lip flip is one of the smallest, most precise neurotoxin treatments I do, and one of the most consistently misunderstood. It is not a substitute for lip filler. It is not going to dramatically increase the size of your lips. What it does is relax the orbicularis oris muscle that pulls the upper lip downward, allowing your upper lip to roll slightly outward when you smile. The effect is a subtly fuller-looking upper lip without adding any volume.

It is what I reach for when a patient wants more upper-lip show in photos but is not ready for filler, or when we are combining with a small filler dose to layer two effects together.

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What it treats

  • A thin-looking upper lip when smiling
  • A gummy smile (excess upper-gum show)
  • A vertical lip line pattern that softens when the lip relaxes
  • A first step before deciding whether filler is right for you

Products used in this treatment: Jeuveau (prabotulinumtoxinA-xvfs), Dysport (abobotulinumtoxinA)

How a lip flip is dosed

The lip flip is one of the smallest doses I administer. Total treatment is typically 2 to 6 units of Jeuveau placed across 3 to 4 injection points along the upper lip border (the orbicularis oris where it inserts at the vermillion).

The dosing has to be precise because too much can affect speech (slight difficulty with certain consonants), drinking from a straw for a few weeks, and your ability to whistle. I dose conservatively on first treatment - we can always add a touch more at the two-week follow-up.

Lip flip vs lip filler

These two treatments solve different problems. A lip filler adds HA volume to the lip tissue itself - you literally have more lip than you had before. A lip flip does not add anything; it just changes how the existing lip drapes by relaxing the muscle that pulls it down.

You can do them together, and many patients do. A conservative filler dose (often less than half a syringe) plus a small lip flip creates a layered effect that looks more natural than either treatment alone at higher doses.

When someone asks me which to do first, my honest answer is: try a lip flip on its own first if you are unsure whether you want to add volume. It is reversible (it wears off in 6 to 10 weeks), it is inexpensive, and it tells us what your lips look like with a more everted upper lip. From there we can decide whether filler is the next step.

Timeline and how long it lasts

Effect starts within 5 to 7 days. Full effect by day 10 to 14. Lasts shorter than other neurotoxin treatments because the dose is so small and the lip moves constantly - typically 6 to 10 weeks. Most lip-flip patients maintain on a 8 to 12 week cycle.

Common side effects

  • Slight difficulty with certain consonants (p, b, m, w) for a few days, usually resolves within 2 weeks. Most patients do not notice this; some musicians and singers do.
  • Brief difficulty drinking from a straw for a week or two.
  • Inability to whistle for the duration of the effect (some patients consider this a feature, some consider it a bug).
  • Rare asymmetry that we can correct with a small touch at the two-week mark.

Common questions about lip flip in houston

How long does a lip flip last?
6 to 10 weeks for most patients. Shorter than most other neurotoxin treatments because the dose is small and lips are in constant motion.
Will it make my lips bigger?
Not in volume terms. The lip itself is not getting larger. What changes is how the lip drapes - the upper lip rolls slightly outward when you smile, which can make it look fuller in photos. If you want actual volume, that is a filler conversation.
Can I combine lip flip with filler?
Yes, and many patients do. A conservative filler dose plus a small lip flip is a layered approach that gives a natural look without overfilling. We can do both in the same appointment or stage them across visits.
Will it affect my speech?
Some patients notice slight difficulty with certain consonants (p, b, m) for the first week. Usually resolves quickly. I dose conservatively on first treatment to minimize this.
Will I be able to drink through a straw?
Most patients can. A small subset find it briefly more difficult for the first week or two.
How much does a lip flip cost?
Less than most neurotoxin treatments because the unit count is small (2 to 6 units total). Quoted at consultation.

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The content on this page is for educational purposes and reflects Jillian Caldwell's clinical perspective. It is not medical advice. Individual results vary. Suitability for any treatment is determined at a private consultation. Clinical services at MV Medical Aesthetics are delivered under physician supervision.