If you have been researching the lip flip and are not entirely sure how it differs from filler, you are in good company. Most patients assume it works the same way, just with a different product. It does not. The lip flip adds no volume. It works by relaxing a specific muscle around the mouth, which reveals more of the upper lip that was already there. The result is not bigger lips. It is a more visible lip.
The Laser Center of Marin is a physician-supervised Allergan Black Diamond and top-100 U.S. practice offering the lip flip alongside the full range of Botox and injectable services. Meghan Dasher, RN, MSN, FNP, performs every injection and assesses each patient's anatomy before confirming the treatment is appropriate.
The lip flip works by relaxing the orbicularis oris, the circular muscle that surrounds the mouth. The relaxed muscle allows the upper lip to roll slightly outward and become more visible.
A small amount of botulinum toxin type A is injected into the upper portion of the orbicularis oris.
As the toxin takes effect over three to seven days, the muscle's resting tension decreases. Because the upper lip is no longer being pulled inward as firmly, the vermilion border (the defined edge of the lip) rolls slightly outward. This outward roll reveals more of the upper lip's surface.
A 2025 systematic review by Pitchford, Desrosiers, and Tolkachjov, published in Archives of Dermatology Research, confirmed that the lip flip typically requires four to six units of botulinum toxin injected into the orbicularis oris. The review found consistent upper lip eversion and improved contour, with patients reporting high satisfaction and minimal downtime.
The lip flip improves upper lip visibility and definition. It does not increase lip volume.
This distinction matters for patient selection. Patients who want a more defined vermilion border, a lip that appears fuller when smiling without resting volume, or a subtle aesthetic change without committing to filler are strong candidates. Patients who want a visibly larger lip at rest are better served by lip filler, which adds volume directly.
The two procedures can also be combined. Many patients use a small amount of filler for volume and a lip flip to refine the border and extend the visible lip surface. The right approach is determined at consultation based on anatomy and goals.
The lip flip also produces a modest reduction in a gummy smile, a condition in which significant gum tissue shows during a full smile. Relaxing the upper portion of the orbicularis oris limits how far the lip elevates during a full smile, bringing the gum tissue less into view.
A lip flip appointment at Laser Center of Marin takes approximately 15 minutes from assessment through completion.
Topical numbing cream is applied to the injection zone for 10 minutes before treatment begins. The injections are a series of small, precise placements along the upper lip border. Most patients describe the sensation as a mild pinch. No anesthesia beyond topical numbing is required.
There is no recovery time following the appointment. Patients can return to normal activities immediately. The only restriction is avoiding rubbing or massaging the area for the remainder of the day.
Lip flip results appear gradually over three to seven days as the botulinum toxin takes effect, with full results visible at approximately two weeks.
The upper lip does not change immediately after injection. As the toxin settles into the muscle, the resting tension decreases, and the outward roll becomes visible. Final results are assessed at two weeks, which is also when any asymmetry or need for a touch-up is evaluated. Most patients find the two-week mark reassuring rather than anxiety-inducing once they know it is built into the process.
The orbicularis oris is used constantly in speaking, eating, and expression. That constant use accelerates the metabolism of the toxin. Most patients see the effect last for two to three months before a repeat appointment is needed.
Several conditions require that the lip flip be postponed or not performed.
Neuromuscular disorders. Conditions such as myasthenia gravis or Lambert-Eaton syndrome are absolute contraindications to all botulinum toxin treatments.
Known allergy to botulinum toxin or its components. Botulinum toxin products contain proteins derived from bacterial fermentation. A documented allergy to the product or its components precludes treatment.
Pregnancy or breastfeeding. All elective injectable treatments are paused during these periods.
Active infection at the injection site. Treatment is rescheduled if an active cold sore, infection, or broken skin is present at or near the planned injection zone.
Concurrent use of aminoglycoside antibiotics. These medications potentiate the effect of botulinum toxin and can produce unintended muscle relaxation beyond the target area.
Lip flip aftercare is minimal but requires attention to the injection zone for the first several hours.
In the two to three weeks following treatment, some patients notice that certain movements, such as using a straw or whistling, feel slightly different. The change is a normal, temporary effect of muscle relaxation and resolves as the treatment wears off.
Yes. The two procedures are complementary. Filler adds volume within the lip body. The flip adjusts how the border presents and how visible the upper lip is. Whether combining them on the same day is appropriate depends on your anatomy and goals. That decision is confirmed at the consultation.
Yes, subtly, and for most patients, that subtlety is exactly the point. The outward roll of the vermilion border is visible at rest, not only when smiling. The change is intentionally understated. Patients wanting dramatic volume increase will not achieve it with the flip alone, but patients wanting a more visible lip without looking like they have had anything done often find it hits exactly the right note.
Most patients describe the sensation as a mild pinch that resolves immediately, and most are surprised by how quick and comfortable the appointment actually is. Topical numbing cream is applied before the injections begin. No injectable anesthesia is required.
Both treatments use the same mechanism, and the injector places the injections in the same general zone. The lip flip prioritizes lip eversion and border definition. Gummy smile treatment prioritizes limiting how far the lip elevates when smiling. The lip flip typically produces modest improvement in both simultaneously.
Yes. The lip flip is frequently combined with other Botox placements at the same session. The assessment at the start of each appointment determines what makes sense for your specific anatomy and goals.
The lip flip is a precise injectable treatment, and the right result depends on someone taking the time to understand what you actually want from it. Placement and dosage follow from that conversation. Getting both right requires an assessment of your specific lip anatomy and the outcome you are working toward.
The Laser Center of Marin is a physician-supervised practice serving Marin County patients since 2003. Meghan Dasher assesses every patient before the first injection.
Visit us at 770 Tamalpais Drive, Suite 301, Corte Madera, CA 94925, book online, or call (415) 945-9314 to schedule.
Medical Disclaimer: Consultation required. Individual results may vary based on lip anatomy, injection placement, and individual metabolism. Botulinum toxin treatments are contraindicated in patients with neuromuscular disorders and during pregnancy. All medications, including supplements and antibiotics, must be disclosed at consultation.
