A lip flip uses a few units of Botox to relax the upper lip so it rolls outward and looks fuller, without adding volume. Learn how it works, cost, how long it lasts, risks, and how it compares with lip filler, clinician-reviewed.
A lip flip is an off-label injection of a few units of botulinum toxin type A (Botox) into the muscle around the upper lip. It relaxes that muscle so the lip rolls outward and shows more pink surface, looking fuller without adding volume. Results last about two to three months.
A lip flip has become one of the most searched lip treatments because it promises a fuller looking mouth from a tiny dose of Botox, with minimal downtime. Understanding exactly what it does, and what it cannot do, is the difference between a result you love and disappointment.
This use of Botox is off-label. Botox (onabotulinumtoxinA) is FDA-approved for frown lines, crow's feet, forehead lines, chronic migraine, excessive underarm sweating, and several neurological conditions, but flipping the lip is not among its cleared indications. Off-label does not mean unproven or unsafe: injecting the muscle around the lip is a well understood, routine technique in trained hands. It does mean you should understand the trade-offs honestly. This guide is educational and is not a substitute for a medical consultation.
**A lip flip is an off-label injection of a few units of botulinum toxin type A (Botox) into the muscle around the upper lip. It relaxes that muscle so the lip rolls outward and shows more pink surface, looking fuller without adding volume. Results last about two to three months.**
The muscle involved is the orbicularis oris, a ring of muscle that encircles the mouth and purses and tightens the lips. In many people this muscle pulls the upper lip inward and downward, curling the pink part (the vermillion) under toward the teeth so less of it shows when you smile or talk. A lip flip targets the top portion of that ring, usually along the border of the upper lip and at the corners of the mouth.
When those fibers relax, the upper lip stops tucking under and gently everts, or flips upward and outward. The visible result is more exposed pink lip and a slightly more pouty, defined shape. Crucially, nothing is added: the lip is not larger, it is simply revealing more of the tissue you already have. That is the single most important thing to understand before booking, and it is why a lip flip suits people who want a small, natural refinement rather than a visibly plumper mouth. The same botulinum toxin type A brands used elsewhere, Dysport, Xeomin, Jeuveau, and Daxxify, can also be used for a lip flip off-label.
Every voluntary muscle contracts when a nerve ending releases a chemical messenger called acetylcholine. Botulinum toxin type A binds to those nerve endings and blocks acetylcholine release, so the signal that tells the muscle to contract never fully arrives. Applied in a tiny dose to the upper part of the orbicularis oris, the toxin partially relaxes the muscle rather than paralyzing it. The lip loses some of its inward, downward pull and settles into a slightly rolled-out position.
This is a neuromodulator effect, not a filler effect. A dermal filler is a gel, usually hyaluronic acid, that is placed under the skin to physically add volume and structure. A lip flip changes nothing about the amount of tissue in the lip; it only changes how that tissue sits by altering muscle tone, so the change is measured in millimeters of extra pink lip on show rather than in added plumpness.
Because the muscle around the mouth is small, constantly moving, and used for eating, drinking, and speaking, injectors use very little product, commonly about two to six units of onabotulinumtoxinA total split across a few points on the upper lip. Too much toxin over-relaxes the muscle and interferes with normal lip function, so restraint and precise placement matter more here than in larger areas like the forehead. The same relaxation can also reduce how much the upper lip lifts when you smile, which is the basis for using the technique to soften a gummy smile.
People choose a lip flip for a few specific reasons, and matching your goal to what the treatment actually delivers is essential. The most common goal is a subtly fuller, more defined upper lip: as the lip rolls out, more of the vermillion shows and the mouth can look a little poutier, especially when you smile. It suits people who feel their upper lip disappears or thins when they smile or speak.
A second common use is softening a gummy smile, known clinically as excessive gingival display, where a lot of gum shows above the top teeth. By relaxing the muscles that hoist the upper lip upward, a carefully placed treatment can lower how high the lip rises and reduce the gum on show. A lip flip can also slightly soften fine vertical lip lines by reducing the pursing action of the muscle.
What a lip flip cannot do is just as important. It does not add volume, so it will not create a dramatically bigger or plumper lip; if that is your goal, filler is the tool, not a flip. It does very little for the lower lip, since the treatment concentrates on the upper lip. And it will not fix significant asymmetry or heavily lined, deflated lips on its own. An honest injector will tell you when your goal calls for filler, a lip lift, or a combination, rather than promising a flip can do more than it can.
Treatment starts with a consultation. The injector looks at how your upper lip moves when you talk, smile, and purse, checks how much pink lip and gum show, and discusses whether a flip alone will meet your goal or whether filler or a combination would serve you better. This is also when they confirm you are a suitable candidate and agree on a conservative dose, because the margin between a nice flip and an over-relaxed lip is small.
The injection itself is quick, usually five to ten minutes. The skin around the mouth is cleaned, and a very fine needle delivers small amounts of toxin at a few points along the upper lip, typically near the center just above the border of the lip (around the cupid's bow) and toward the corners of the mouth. Most people describe it as a series of quick pinches. Numbing cream is often optional because the dose and needle are so small, though it can be used for comfort.
There is essentially no downtime. You can return to normal activities right away. Standard aftercare mirrors other Botox treatments: stay upright for about four hours, avoid rubbing or massaging the lips, and skip strenuous exercise, saunas, and lying face-down for the rest of the day, all to keep the toxin from migrating beyond the intended muscle. Injectors also advise avoiding a straw and being gentle with the lips for a day or two. The effect is not immediate, so you leave looking the same and the change develops over the following days.
A lip flip has a gradual onset. You will typically start to notice the upper lip rolling out and looking a little fuller within about three to five days, with the full effect settling in around one to two weeks as the toxin takes hold.
Duration is the main trade-off compared with filler. Most people find a lip flip lasts roughly two to three months, and sometimes up to around five months, which is shorter than Botox lasts in larger areas like the forehead. The lip muscle is small, highly active, and used constantly for eating and speaking, so the tiny dose wears off relatively quickly. Clinical work on botulinum toxin for the upper lip shows the effect peaks at about two weeks then declines toward baseline over the following months, which fits this timeline.
Maintaining the look therefore means repeating the treatment several times a year. Set expectations honestly: no injector can guarantee a specific lip shape or a precise amount of extra fullness, and results vary with your anatomy, muscle strength, dose, and metabolism. The change is a modest, fully temporary refinement. If you stop, the lip simply returns to how it looked before as the muscle regains its normal tone, with no lasting change to the tissue.
For healthy adults treated by a trained, licensed injector, a lip flip is generally considered a low-risk procedure, partly because it uses such a small amount of toxin. The most common effects are mild and temporary: minor bleeding, soreness, redness, swelling, or a small bruise at the injection points, and occasionally a headache, all of which usually settle within a few days.
The downsides that are specific to the lip come from over-relaxing or misplacing the muscle you use for everyday mouth movements. If too much toxin is used, or it is placed unevenly, the upper lip can relax too much and feel weak or heavy, which can make it harder to fully close the lips, whistle, drink through a straw, or clearly pronounce sounds such as p and b that need firm lip contact. Some people notice their smile looks different or slightly uneven, or that the lip feels stiff. Almost all of these effects are temporary and fade as the toxin wears off, and skilled, conservative dosing greatly lowers the chance of them happening at all, which is why individualizing the treatment to your anatomy matters.
Serious, systemic problems such as trouble swallowing or breathing are extremely rare at these tiny cosmetic doses, but they are the reason all botulinum toxin products carry a boxed warning about the possibility of the toxin spreading beyond the injection site; seek urgent care if such symptoms occur. Botox is not recommended during pregnancy or breastfeeding, or for people with certain neuromuscular disorders such as myasthenia gravis. Because the treatment sits right on a muscle you rely on to eat and speak, provider skill and restraint are the single biggest safety factors.
A lip flip is usually one of the more affordable injectable treatments, because it uses only a handful of units of toxin. Pricing is typically either per unit of Botox or as a flat fee for the lip flip, and since a treatment often uses only about two to six units, the total is far lower than a syringe of lip filler. Real prices vary widely, so treat any online figure as a rough guide rather than a quote, and expect city, clinic, injector expertise, and the product used to move the number.
It helps to understand how the unit math works. Botox is commonly priced per unit in the low tens of dollars in the United States, so a lip flip that uses four units costs about four times a clinic's per-unit rate, and a larger dose costs proportionally more. Some clinics charge a set lip flip fee that bundles the small amount of product. Always ask whether pricing is per unit or a flat fee, how many units are planned, and whether a consultation fee applies.
Budget for maintenance, not a one-time cost. Because a lip flip lasts only about two to three months, keeping the look means several treatments a year, so the meaningful figure is the annual total rather than the price of one session. A flip costs less per visit but is repeated more often, while filler costs more up front and lasts far longer. A lip flip is purely cosmetic, so insurance does not cover it.
The most common question people bring to a consultation is whether they want a lip flip or lip filler, and the honest answer depends entirely on the result you are after. They are different tools. A lip flip relaxes muscle so your existing lip shows more of itself; lip filler injects hyaluronic acid gel to physically add volume and reshape the lip. A flip is subtle, cheap, and short-lived; filler is more dramatic, more expensive, and lasts much longer, commonly around six to twelve months and sometimes more.
If you want a small, natural refinement, more pink lip on show, a slightly poutier upper lip, or less gum when you smile, a lip flip may be all you need. If you want a noticeably fuller lip, better definition of the lip border, or to correct volume loss and asymmetry, filler is the appropriate choice. Many injectors also combine the two, using filler for volume and a flip to keep the upper lip from tucking under, tailored to your anatomy. The table below summarizes the practical differences.
| Attribute | Lip flip (Botox) | Lip filler (hyaluronic acid) |
|---|---|---|
| What it does | Relaxes muscle so the upper lip rolls out and shows more pink | Adds gel volume to physically plump and reshape the lips |
| Effect | Subtle, natural, no added volume | More noticeable added fullness and definition |
| Onset | Gradual over 3 to 14 days | Immediate, with final look after swelling settles |
| How long it lasts | About 2 to 3 months (up to ~5) | About 6 to 12 months or more |
| Relative cost | Lower per visit, uses only a few units | Higher per visit, priced per syringe |
| FDA status | Off-label use of Botox | Many HA lip fillers are FDA-approved for lip augmentation |
| Best for | Small refinement, gummy smile, more lip on show | Real volume, shape correction, bigger change |
Good candidates are generally healthy adults who want a subtle enhancement of the upper lip, who understand the result is modest and temporary, and whose main issue is that the lip curls under or shows little pink rather than a true lack of volume. People bothered by a gummy smile driven by an overactive upper lip are often good candidates too. If your goal is a clearly bigger lip, you will likely be happier with filler, and a candid injector will tell you so rather than selling you a flip that cannot deliver it.
You are not a good candidate if you are pregnant or breastfeeding, have a neuromuscular disorder such as myasthenia gravis or Lambert-Eaton syndrome, have an active infection or cold sore outbreak at the treatment site, or have a known allergy to botulinum toxin or its ingredients. People whose work or hobbies depend on precise lip control, such as professional wind instrument players or singers, should weigh the small risk of temporary lip weakness carefully. Honest candidacy screening matters more than a low price.
Because the treatment sits directly on the muscle you use to eat, drink, and speak, provider skill and conservative dosing are the difference between a natural flip and an over-relaxed lip. Look for a licensed, experienced injector, a physician, nurse practitioner, physician assistant, or dentist working within their scope, who treats the lip regularly, examines how your mouth moves before injecting, explains the off-label status and the specific downsides plainly, and starts conservatively. When you are ready, use the link below to find a qualified injector near you and begin with a consultation rather than a same-day treatment.
Most lip flips last about two to three months, and sometimes up to around five months. That is shorter than Botox in larger areas because the small lip muscle is used constantly for eating and speaking, so the tiny dose wears off faster. Keeping the look means repeating the treatment several times a year.
The result is subtle and short-lived, and it adds no real volume. Dose-related side effects, all temporary, can include a heavy or weak upper lip, difficulty fully closing the lips, drinking through a straw, whistling, or clearly saying sounds like p and b, plus minor bruising or an uneven smile if placement is off.
A lip flip is usually one of the cheaper injectables because it uses only a few units of Botox. Clinics charge either per unit, often in the low tens of dollars, or a flat fee. Prices vary by city, clinic, and injector, so treat any figure as a rough guide and ask how pricing works before booking.
Choose a lip flip for a subtle, natural refinement that shows more of your existing lip and softens a gummy smile. Choose filler when you want noticeably more volume, better lip definition, or longer-lasting results. Filler lasts far longer but costs more; some people combine both. An injector can advise based on your anatomy and goal.
Get a lip flip if your upper lip has decent volume but curls inward and disappears when you smile. It uses 4-8 units of Botox to roll the lip outward, costs $100-$300, and lasts 6-10 weeks. If your upper lip is naturally thin, filler will serve you better.
The lip flip has a narrow ideal candidate, which is why it disappoints so many people. Botulinum toxin is placed superficially in the orbicularis oris just above the lip border, relaxing the fibers that curl the vermilion inward so more pink lip shows. It adds no volume. Good candidates have upper-lip tissue that is being hidden by a strong muscle; poor candidates have genuinely thin lips, because eversion only reveals a thinner lip. Expect temporary difficulty with straws, whistling, and "p" and "b" sounds for one to two weeks. This use of Botox is off-label - legal and routine, but not reversible, so you wait it out. Botulinum toxin is not used in pregnancy or breastfeeding.
Lip flip before-and-after photos show a subtly everted upper lip with more visible pink vermilion and a crisper Cupid's bow - most obvious when smiling, far less so at rest. The lip is not physically bigger. Honest comparisons are shot at day 10-14 in the same expression and lighting.
Read these galleries carefully. Because a lip flip changes lip position rather than lip volume, the real result is modest, and any photo showing a dramatically plumper lip almost certainly involved filler as well - ask the practice directly whether filler was used in the "after." Also check that both photos use the same expression: the flip's effect is largest in a full smile, so a resting "before" paired with a smiling "after" exaggerates it. Botox takes 3-5 days to start and 10-14 days for the full effect, so an "after" taken at 48 hours means nothing. Results fade over 6-10 weeks. This is an off-label use of botulinum toxin, which is legal and common.
A lip flip is a Botox treatment: 4 to 8 units injected into the muscle just above the upper lip. The muscle relaxes, the lip rolls slightly outward, and more pink vermilion shows, giving a fuller look without added volume. It takes about 10 minutes, costs $100 to $300, and lasts 6 to 10 weeks.
The target is the orbicularis oris, the ring of muscle around the mouth that pulls the upper lip inward. Relaxing its superficial upper fibres lets the lip evert, revealing vermilion that was previously tucked under. Nothing is added, so the lip is not physically larger, which is the single biggest source of patient disappointment: it suits people whose upper lip disappears when they smile and disappoints those with genuinely thin lips. Onset is day 3 to 5, peaking at day 10 to 14. The trade-off is functional: for one to two weeks, straws, whistling and p and b sounds can be difficult, so singers, wind musicians and public speakers should think carefully. Botulinum toxin cannot be dissolved, unlike filler, so an unwanted result is waited out. It is contraindicated in pregnancy and breastfeeding, and this is an off-label use.
A lip flip lasts 6-10 weeks - shorter than Botox anywhere else on the face. Some people get up to 12 weeks. The muscles around the mouth are in near-constant use for speaking, eating, and smiling, which shortens how long the toxin's effect holds.
The timeline: nothing for 1-2 days, first softening at day 3-5, full effect at day 10-14, then a gradual fade. Because only 4-8 units are used in a very active muscle, the effect wears off faster than a 20-unit forehead treatment. Daxxify may stretch a flip to roughly 3-4 months, though data specific to the lip is limited. Maintaining a flip year-round means 4-8 sessions annually, which is why the running cost can approach or exceed lip filler despite the low per-visit price. If you find yourself re-treating every six weeks, it's worth discussing whether conservative filler - alone or combined with the flip - fits your goal better.
A lip flip usually costs $100-$300 per session in the US. It uses only 4-8 units of Botox at $10-$18 per unit, so the price is often set by a clinic minimum rather than the actual product. Med spas sit at the low end; physician practices at the high end.
The low sticker price is misleading unless you look at a full year. A flip lasts 6-10 weeks, so maintaining it means roughly 4-8 sessions - about $400-$1,800 annually. Lip filler costs $600-$1,200 per syringe but lasts 6-18 months, making the annual cost broadly comparable. Prices vary by market and injector credential, and promotional pricing near $99 is common. Be wary of anyone selling a lip flip as a substitute for volume: if your upper lip is thin, this is money spent on a result you won't like. The treatment is an off-label use of botulinum toxin, which is legal and standard practice, and it is never covered by insurance.