Guide to Botox Lip Flip Treatment

If your upper lip tends to disappear when you smile, a botox lip flip may be the subtle change you are looking for. It is one of the gentlest lip treatments in medical aesthetics: no filler, no needles deep into the lip, and usually no real downtime. It is also widely misunderstood, so it helps to know exactly what it does before you book.

This guide is about the lip flip only: a small neuromodulator treatment that repositions the upper lip. If what you want is volume, see our separate guide to lip filler instead.

At GLIF Medical, our Montréal medical aesthetic clinic, we are often asked whether a lip flip can replace filler, how long it lasts, whether it hurts and whether it looks natural. This guide answers all of that in plain language: the benefits, the procedure step by step, how to prepare, the results timeline, risks, aftercare, what happens when it wears off, and the questions to ask any practitioner.

What Is a Botox Lip Flip?

A lip flip is a cosmetic technique that uses a very small amount of botulinum toxin, a type of neuromodulator, placed along the upper lip border. The muscle that circles the mouth (the orbicularis oris) normally pulls the upper lip slightly inward and keeps it taut. When a few fibres relax, that pull weakens and the lip rolls outward and upward a little, showing more of the pink part of the lip, known as the vermilion.

The result is a softer, slightly fuller-looking upper lip with a more defined shape. Importantly, nothing is added to the lip. That is the key difference from hyaluronic acid filler, and it is why the effect is subtle and temporary.

The amount of product is small, usually a few units spread across several points, because the goal is to relax part of the muscle, not all of it. Too much relaxation can make the lip feel loose or flat and affect how you drink and speak. This is why dose and placement matter far more than the product brand.

Neuromodulator vs Filler: Why a Lip Flip Does Not Add Volume

Many people searching for lip enhancement are unsure which product does what, so it is worth being clear. The two work in completely different ways:

• Neuromodulators (often called botox) temporarily relax muscles. They do not carry volume, so they cannot make lips bigger. In the lip area they are used to flip the upper lip, soften a gummy smile or smooth fine vertical lines around the mouth.
• Hyaluronic acid fillers are a separate treatment that adds volume. We cover them in their own guide.

This is why a lip flip is often described as a repositioning treatment rather than an enhancement of size. If a clinic promises “bigger lips” from a lip flip alone, that is a red flag.

Botox Lip Flip at a Glance

Benefits of a Lip Flip

A lip flip is popular because it delivers a visible but gentle change with very little commitment. Here is what it does best.

An honest look at the limits

A lip flip is not a fix for everything. It will not add fullness to lips that are naturally thin, correct asymmetry caused by bone or teeth, or fill in lines. The change is usually described as small, and some people barely notice it. If you are hoping for a dramatic difference, filler is more likely to meet your expectations. Being clear about this before treatment is part of a good consultation.

Lip Flip vs Lip Filler: A Quick Comparison

They are different tools, not rivals. If you want real volume, read our guide to natural-looking hyaluronic acid lip fillers. If you want a light lift and more upper-lip show, a lip flip may be enough. Some people combine both, but that decision should follow a medical consultation.

A simple way to decide

• Your main complaint is that your upper lip vanishes when you smile. A lip flip may be enough.
• You show a lot of gum when you smile. A lip flip may help, but a consultation is needed to confirm the cause.
• Your lips look thin or flat at rest. Filler is more likely to give the result you want.
• You want a gentle first step. A lip flip is temporary and low commitment.

Who Is a Good Candidate?

The last point matters. Because the muscle that controls the lips is involved, some people notice small changes when whistling, using a straw or pronouncing certain sounds for a short time. Tell your practitioner about your lifestyle and work.

Other things to mention at your consultation

• Cold sores. If you get them, tell your practitioner. Injections near the lip can sometimes trigger an outbreak, and a preventive plan may be advised.
• Recent dental work or events. Plan the lip flip so that it does not clash with dental appointments, photos or weddings. Two weeks is a sensible buffer.
• Medications and supplements. Some can increase bruising. Do not stop anything prescribed without medical advice.
• Previous lip treatments. Existing filler, scars or past reactions affect the plan.

How to Prepare for Your Lip Flip

Lips have many small blood vessels, so bruising is the most common visible side effect. Good preparation reduces the chance, though it cannot remove it completely.

• Ask your practitioner which medications and supplements to avoid beforehand. Many clinics advise avoiding alcohol and, where safe for you, aspirin, anti-inflammatories, fish oil and similar products in the days before treatment.
• Do not stop prescribed medication on your own. Speak to your doctor first.
• Arrive with clean skin and without heavy lip products.
• Avoid scheduling the appointment right before an important event, so there is time for any mild swelling or bruising to settle.
• Write down your questions and bring photos of how you want your smile to look.

The Botox Lip Flip Procedure Step by Step

1. Consultation. A medical professional reviews your health, medications, goals and expectations, and explains whether a lip flip suits your lip shape.
2. Assessment and marking. Your lips are examined at rest and when you smile and speak, and injection points are planned.
3. Preparation. The area is cleaned. Numbing cream or cooling may be used for comfort.
4. Injections. A small number of tiny injections are placed along the upper lip border using a fine needle, close to the surface. A cannula is not used for a lip flip.
5. Aftercare advice. You receive clear instructions and guidance on what to expect over the next two weeks.
6. Follow-up. A review can be arranged if you want to check or fine-tune the result.

The injection stage is brief. Most of the appointment is the consultation and planning, which is where a good outcome is decided. We recommend a medical consultation before any injectable treatment, and you can learn more about our Botox treatments in Montréal.

Does it hurt?

Lips are sensitive, so you will feel the needle. Most people describe quick pinpricks and a mild sting rather than real pain, and the effect is over within moments. Numbing cream, cooling and a calm, steady technique all help. If you are anxious, tell your practitioner so they can adapt the pace.

Botox Lip Flip Results Timeline

Because the effect develops slowly, avoid judging the result in the first few days. Early swelling can make the lip look different from the final outcome. If something feels uneven after two weeks, contact the clinic rather than adjusting it yourself.

Bruising and swelling: what is normal?

Mild swelling and tenderness are common in the first one to three days. A small bruise can appear and usually fades within a week. Swelling that keeps getting worse, intense pain, or a hard, very hot area should be checked by a doctor.

Aftercare: Do and Don’t

Gentle habits for the first day help keep the product where it was placed. After that, you can return to normal life. Drink normally, but expect that a straw may feel odd for a while.

Risks and Side Effects

A lip flip is generally considered low risk when performed by a qualified professional, but no injectable treatment is risk-free. Possible effects include:

• Bruising, swelling, tenderness or redness at the injection points
• Temporary asymmetry or an uneven effect
• Brief difficulty with straws, whistling, kissing or certain sounds
• Mild drooling or reduced control while drinking, usually temporary
• A result that is too subtle, or an upper lip that looks slightly flat if too much relaxes
• A cold sore outbreak in people prone to them
• Headache or an allergic reaction (rare)

Contact a doctor immediately if you develop trouble swallowing, speaking or breathing after any botulinum toxin treatment. Most effects fade as the product wears off, which is one reason a conservative approach is best.

When It Wears Off: Maintenance and What to Expect

The effect of a lip flip fades gradually over about two to three months as the muscle recovers. There is no sudden change, and no sagging or lasting damage from stopping. Your lip simply goes back to how it was.

• Repeat treatments. People who enjoy the result usually repeat it every few months. Your practitioner can adjust the dose based on how you responded.
• If you are unhappy. A lip flip cannot be dissolved. The best response is to wait for it to fade, and to review with your practitioner so the next plan is adjusted.
• Planning ahead. If you are treating the area for an event, book a few weeks early so you can see the full effect and have time for a touch-up.

How Much Does a Botox Lip Flip Cost?

Pricing depends on the clinic, the amount of product used and the practitioner’s experience, so be wary of prices that seem unusually low. A fair quote should be clear about what is included, such as the consultation and any follow-up. For current pricing, book a consultation and we will explain the cost before treatment.

Questions to Ask Before Your Lip Flip

• Who will inject, and what are their qualifications and experience?
• Which product will be used, and how much?
• Is a lip flip right for my lip shape, or would another option suit me better?
• What side effects are possible, and what happens if I am unhappy?
• How long will results last, and when can I review them?
• Is a follow-up included?
• How do you handle bruising and what should I avoid beforehand?

Myths About the Botox Lip Flip

Choosing a Safe Clinic in Canada

In Canada, botulinum toxin products are regulated, and Health Canada advises that they be administered by qualified healthcare professionals. A lip flip is a technique many clinicians use beyond the specific areas listed on product labels, so ask your practitioner to explain this openly. You can look up authorised products in Health Canada’s Drug Product Database, and you should always choose a clinic that starts with a medical consultation.

• Look for a mandatory medical consultation, not just a quick booking.
• Ask to see before-and-after photos of the same practitioner’s work.
• Expect honest advice, including being told when a treatment is not right for you.
• Make sure follow-up care is clear.

Your Doctor at GLIF Medical

Botox Lip Flip in Montréal at GLIF Medical

GLIF Medical is a medical aesthetic clinic in Montréal offering injectables, skin treatments and consultations. Every treatment plan begins with an assessment, because the best lip result depends on your anatomy, your smile and your goals, not on a template. We will tell you honestly whether a lip flip, filler, or no treatment is the right call.

Key Takeaways

• A botox lip flip rolls the upper lip outward; it does not add volume.
• Results build over about two weeks and typically last two to three months.
• It suits people who want a subtle, temporary change or a softer gummy smile.
• Mild bruising and swelling are the most common effects.
• Temporary changes to whistling, straws or speech are possible.
• It cannot be dissolved, so a conservative dose is the safest start.
• Choose a qualified professional and start with a medical consultation.

Frequently Asked Questions

This article is general information, not medical advice. A qualified medical professional should assess your suitability for any treatment. Last updated October 2026.