Bunny Lines Botox in Toronto: What Causes Them and What Treatment Actually Involves
Bunny lines are the diagonal, sometimes fan-shaped creases that show up on the sides of the nose when you smile broadly, laugh, or scrunch your face, and Botox treats them by relaxing the small nasalis muscle responsible for that scrunching motion. Once the muscle can’t contract as forcefully, the skin over it stops folding the same way, and the lines soften noticeably within about a week.
That’s the short version. If you’ve noticed these lines only after starting Botox somewhere else on your upper face, you’re not imagining it, and we’ll get into exactly why that happens a bit further down. This guide walks through what bunny lines actually are, how the treatment works, what a realistic unit range and timeline look like, and where the honest limits of Botox for this particular concern sit.
At Rejuvenation Med Clinic, our Bunny Lines Botox treatment is one part of a broader menu of Botox services for the upper face. Most people who come in asking about it have either noticed the lines gradually over the years, or they’ve spotted them for the first time after treating their frown lines or forehead, which, understandably, is a little confusing the first time it happens.
Related Service: Bunny Lines Botox at Rejuvenation Med Clinic
What bunny lines actually are, and what’s happening under the skin
The nose itself doesn’t have a lot of muscle to speak of, but the nasalis does sit across the bridge, fanning out slightly toward each nostril. When you smile widely, laugh, squint into the sun, or deliberately scrunch your nose, the nasalis contracts and pulls the skin at the sides of the nose into small diagonal folds. Do that enough times over enough years, and the folds start etching themselves into the skin even when the muscle relaxes again, the same basic process that produces crow’s feet or forehead lines elsewhere on the face.
Genetics plays a role in how visible bunny lines become and how early they show up. Some people have a more active nasalis to begin with, or thinner skin over the bridge of the nose that creases more readily. Sun exposure and general skin aging add to it over time, since collagen loss makes any repeated fold a little more likely to stick around between expressions rather than smoothing itself back out.
It’s worth being precise about what bunny lines are, mainly because the term gets applied loosely online to almost anything happening on the nose. They’re specifically the diagonal or vertical creases from nasalis contraction, not the same as a permanent nasal crease from sleeping position, not the same as general skin texture on the nose, and not related to the cartilage structure of the nose itself. If what you’re seeing is more of a horizontal crease across the bridge that’s present at rest regardless of expression, that’s worth mentioning at a consultation, since it may point to something other than active muscle movement.
| Feature | Dynamic bunny lines | Static bunny lines |
|---|---|---|
| When visible | Mainly when smiling, laughing, squinting, or scrunching the nose | Visible even with the face fully relaxed |
| Underlying cause | Active nasalis contraction folding the skin | Years of repeated folding plus reduced skin elasticity |
| Typical response to Botox alone | Usually softens substantially once the muscle is relaxed | Often improves, though some residual creasing can linger, especially in thinner, sun-damaged skin |
| When something else is sometimes discussed alongside Botox | Rarely necessary on its own | Skincare focused on collagen support, or in some cases a light resurfacing treatment, may come up as an add-on rather than a replacement |
Why bunny lines often show up right after Botox somewhere else
This one catches a lot of people off guard. You treat your forehead or your glabellar lines (the “11 lines” between the brows), the areas you actually wanted to soften look great, and then a week or two later you notice new diagonal creases on the sides of your nose that you’re fairly sure weren’t there before, or at least weren’t nearly this noticeable.
What’s actually happening is a kind of muscle compensation. Your face has a limited number of muscles available to produce a big, expressive smile or an exaggerated squint, and they tend to work as a team. When the forehead and glabella muscles are relaxed by Botox and can no longer contract as forcefully, some of that expressive effort gets redirected to nearby muscles that are still fully active, and the nasalis is one of the more common ones to pick up the slack. The lines were probably always capable of appearing; they simply didn’t stand out as much when the muscles around them were also moving and drawing attention elsewhere.
This is genuinely common enough that a lot of injectors will mention it proactively before treating frown lines or the forehead for the first time, particularly in patients with an expressive smile or a habit of scrunching the nose. It isn’t a sign that anything went wrong with your original treatment. It’s simply how facial muscles redistribute effort once some of them are temporarily quieter than usual.
How Botox works on the nasalis, and how many units you actually need
Botox is a purified form of botulinum toxin type A. Once injected, it blocks the release of a chemical messenger called acetylcholine at the junction between nerve and muscle, which temporarily prevents the targeted muscle fibers from contracting with their usual force. For bunny lines, very small amounts are placed just under the skin along the sides of the nose, directly over the nasalis, so the muscle can no longer fold the skin as sharply when you smile or scrunch.
Because the nasalis is a small, thin muscle compared to something like the forehead or masseter, the unit count involved is correspondingly modest. Most patients need somewhere in the range of 4 to 10 units total, often split as roughly 2 to 5 units per side, though the exact number depends on how strong your nasalis contraction is and how many diagonal folds you typically show when you scrunch. Someone with a single faint line on each side usually needs less product than someone with several deep, well-defined creases.
This is also an area where precision matters more than raw unit count. Because the injection sites sit close to muscles that control the upper lip, particularly the levator labii superioris, going too deep, too low, or too medial can let the toxin diffuse into that muscle rather than staying confined to the nasalis. Peer-reviewed anatomical guidance on where to inject botulinum toxin for bunny lines notes that injecting directly into the crease itself, rather than into the nasalis muscle belly, relies on passive diffusion and produces less predictable results, which is part of why technique specific to this exact area matters. That’s part of why this is sometimes mentioned, a little dramatically, as one of the trickier spots on the face to treat well, and it’s a good reason to have it done by someone specifically experienced with this injection pattern rather than someone extrapolating from forehead technique.
Botox Cosmetic itself is approved by Health Canada for several aesthetic indications on the upper face, and bunny lines injections use the same product, simply placed in a different, smaller muscle than the areas the approval most commonly gets discussed for.
What actually happens during a consultation and treatment appointment
A proper consultation starts with your injector watching your nose move, usually by asking you to smile broadly, laugh, or deliberately scrunch your nose a few times, since dynamic lines only show up under those conditions and static ones show up regardless. They’ll ask about your medical history, any prior Botox treatments elsewhere on your face and how you responded, and what specifically bothers you about the lines. If your bunny lines appeared after treating another area, it’s worth mentioning that directly, since it helps your injector plan around the muscle compensation pattern discussed above rather than treating the nose in isolation.
The treatment itself is quick, generally somewhere between 10 and 15 minutes from start to finish. After cleansing the skin, the injector maps the fold pattern while you scrunch your nose, then uses a very fine needle to place small amounts of Botox at a few points along each side. Most patients describe the sensation as a brief pinch rather than anything painful, and there’s no sedation or downtime involved, so you can go straight back to your day. We’ll cover the specific things worth avoiding in the hours afterward in the aftercare section below.
Timeline: how quickly bunny lines respond, and how long the result lasts
Most people notice the first softening of the lines within about 3 to 5 days after treatment, though the full effect generally isn’t visible until somewhere around 10 to 14 days, once the toxin has fully taken hold in the muscle. It’s worth not judging the result too early. A slightly asymmetric or incomplete-looking outcome at day 3 often evens out considerably by the two-week mark.
Duration is typically reported in the 3 to 4 month range, broadly similar to Botox in other small facial muscles like the glabella or crow’s feet, though individual metabolism, how strong your nasalis naturally is, and how many units were used can shift that window somewhat. Some patients find their bunny lines stay softened a bit longer than 4 months, others notice the muscle activity returning a little sooner, and that’s genuinely normal variation rather than a sign anything was done incorrectly.
Side effects and risks: what’s expected, and what’s worth a call to the clinic
The nose sits close to muscles that control the upper lip, which makes precise depth and placement more important here than in some other areas of the face. Most reactions are mild and expected. A smaller number are worth knowing how to recognize specifically because they’re a reason to call your provider rather than simply wait them out.
| Normal, expected reaction | Possible warning sign, contact your clinic |
|---|---|
| Small bruises or pinpoint redness at the injection sites, usually fading within hours to a couple of days | Noticeable drooping or asymmetry on one side of the upper lip when smiling |
| Mild swelling or tenderness on the sides of the nose for a day or so | Difficulty fully closing the mouth or an unusual change in how your smile looks |
| A brief stinging sensation during the injections themselves | Signs of an allergic reaction such as widespread hives, facial swelling, or trouble breathing |
| Slight, temporary tightness across the bridge of the nose | Symptoms that are worsening rather than improving several days after treatment |
The rare but genuinely worth-knowing risk with this specific area is diffusion into the levator labii superioris, the muscle that lifts the upper lip. If that happens, it can produce a temporary asymmetric smile or a subtle drooping on one side of the upper lip, sometimes described online as one of the more noticeable ways Botox “can go wrong” in this area. It’s uncommon when the injector has real experience with this exact pattern, and it resolves on its own as the Botox wears off over the following weeks, but it’s exactly the kind of thing anatomical precision in this specific spot is meant to prevent.
Who is a good candidate for bunny lines Botox, and who isn’t
Good candidates are generally healthy adults who notice diagonal creases on the nose when they smile or scrunch, with realistic expectations about a temporary, subtle softening rather than a permanent change to nasal anatomy. People already comfortable with Botox elsewhere on the face, especially the forehead or glabella, often find bunny lines treatment straightforward to add to an existing routine.
There are also situations where this isn’t the right first step, and an honest consultation should say so plainly:
- Pregnancy or breastfeeding, since Botox hasn’t been studied for safety in these situations and isn’t recommended
- Neuromuscular conditions such as myasthenia gravis, where botulinum toxin can worsen muscle weakness
- An active skin infection at or near the intended injection sites
- Known allergy to any ingredient in the Botox formulation
- Deep, permanent nasal creases unrelated to muscle movement, which Botox won’t meaningfully change
- Recent lip or nasal filler in the immediate area, which is worth discussing with your injector before adding Botox on top
None of these mean bunny lines treatment is off the table forever. They’re simply reasons a provider might recommend waiting, adjusting the plan, or having a different conversation first, which is a normal part of a consultation doing its job properly.
Combining bunny lines Botox with other treatments
Because bunny lines often show up alongside, or shortly after, treatment of the forehead or glabella, a lot of patients end up treating multiple upper-face areas in the same visit rather than as separate appointments. This is generally straightforward since it’s the same product injected at different sites, though your injector will calculate total dosing across every area treated that day rather than adding a flat unit count per area regardless of what else is happening.
Common pairings include forehead lines, 11 lines between the brows, and occasionally crow’s feet, since all of these areas involve small, expressive muscles that respond to similar injection technique. Some patients also ask whether bunny lines should be treated alongside dermal filler elsewhere on the face; our overview of dermal fillers in Toronto covers that separately, since fillers and Botox work through entirely different mechanisms and address different kinds of concerns.
If you’re weighing Botox brands, our clinic’s Dysport vs. Botox comparison covers the general differences between the two products, though the specific unit ranges discussed in this guide refer to Botox rather than Dysport, since dosing conversions between the two aren’t a simple one-to-one swap.
Patients focused on the lower half of the face sometimes ask whether bunny lines treatment relates to smile-line concerns like nasolabial fold filler. It doesn’t directly, since nasolabial folds sit lower on the face and are addressed with volume rather than muscle relaxation, but the two are commonly discussed in the same conversation about overall facial balance.
Alternatives to Botox for bunny lines
Botox isn’t the only option discussed for this area, though it’s the most direct way to address the muscle contraction actually causing the creases. The table below lays out how the main alternatives compare, since a lot of general skincare marketing conflates “reducing fine lines” with actually addressing an active, contracting muscle.
| Option | What it actually addresses | Effect on the underlying muscle | Typical duration |
|---|---|---|---|
| Botox | Directly reduces nasalis contraction, softening dynamic and often static bunny lines | Temporarily relaxes the muscle | Roughly 3 to 4 months |
| Dermal filler | Can soften the appearance of some static creases by adding volume, but doesn’t reduce the underlying muscle contraction | No effect on muscle activity | Varies by filler type, typically 6 months or longer |
| Topical retinoids or collagen-supporting skincare | Gradual improvement in overall skin texture and thickness over months | No effect on muscle activity | Ongoing, ties to continued use |
| Light resurfacing (for deep, static creases only) | Improves skin texture and some etched-in lines | No effect on muscle activity | Varies; typically needs a maintenance schedule |
For most people whose bunny lines are primarily dynamic, meaning they mainly show up on expression, Botox is the more direct fit simply because it addresses the actual cause. For deep, fully static creases layered on top of years of sun damage, a combination approach that also supports overall skin quality is sometimes a more realistic conversation than expecting Botox alone to erase everything.
Aftercare: what to do, and what to skip, in the first day or two
Aftercare for bunny lines Botox is fairly simple, though a couple of points matter more here than in some other areas, mainly because of how close the injection sites sit to the muscles controlling the upper lip.
| Timeframe | What’s generally recommended | What to avoid |
|---|---|---|
| First 4 hours | Stay upright, gentle normal activity is fine | Lying flat, bending over for extended periods, vigorous exercise |
| First 24 hours | Light activity, staying hydrated, applying SPF if going outside | Rubbing or massaging the treated area, saunas, hot yoga, alcohol |
| First 1 to 2 weeks | Normal activity, tracking how the lines respond when you smile or scrunch | Assuming an uneven result at day 3 or 4 is the final outcome, since full effect can take up to two weeks |
| Ongoing | Note how long your individual results last so future appointments can be timed accordingly | Booking a touch-up before the two-week mark, before the true result is fully visible |
If you notice a drooping upper lip, an asymmetric smile, or anything that looks like it’s genuinely worsening rather than settling into place over the days after treatment, that’s the one category worth calling the clinic about directly rather than waiting to see if it resolves on its own.
Bunny lines vs. other Botox treatment areas: a quick reference
Search demand for different Botox treatment areas tends to overlap in people’s minds, and it’s easy to land on information written about the wrong one. The table below is meant to help you get to the right guide rather than trying to apply information about one area to a different one entirely.
| Treatment area | Location | What it addresses | Learn more |
|---|---|---|---|
| Bunny lines | Sides of the nose | Diagonal creases from nasalis contraction when smiling or scrunching | This guide |
| 11 lines (glabellar lines) | Between the eyebrows | Vertical frown lines from the corrugator and procerus muscles | 11 Lines Botox in Toronto |
| Platysmal bands | Front of the neck | Vertical cording from platysma muscle contraction | Platysmal Bands Botox |
| Marionette lines | Corners of the mouth to the jaw | Downturned mouth corners, often paired with filler rather than Botox alone | Marionette Lines Botox |
| Masseter (jaw) | Jaw muscle, sides of the face | Jaw slimming, teeth grinding, TMJ-related tension | Masseter Botox in Toronto |
Cost factors to understand before you book
We’re not going to invent a specific price here, but it helps to understand what actually drives cost so a quote makes sense once you get one. The main factor is total unit count, which depends on how many creases you have on each side and how strong the underlying muscle contraction is. A single faint line on each side naturally costs less to treat than several deep, well-defined creases needing more careful, individually placed injections.
| Factor | How it generally affects cost |
|---|---|
| Number and depth of visible creases | More, deeper creases typically require more total units and more injection points |
| Combined treatment areas | Adding forehead, glabella, or other Botox areas in the same visit changes total unit count and total cost |
| Injector experience | Per-unit pricing varies by provider and by market |
| Touch-up needs | An initial touch-up appointment, if needed after the two-week mark, may add a small additional cost |
For general per-unit Botox pricing context in Toronto, our existing Botox cost guide is a useful starting point, with the caveat that bunny lines typically need fewer total units than larger areas like the forehead. OHIP does not cover cosmetic Botox treatments, including bunny lines, since this remains an aesthetic rather than medically necessary indication. Our financing options page outlines payment plans if that’s useful for planning ahead of a consultation.
Choosing a qualified provider
Because the injection sites for bunny lines sit close to the muscles controlling the upper lip, precise anatomical placement matters more here than it does in some larger, more forgiving treatment areas. At Rejuvenation Med Clinic, Botox treatment is provided under the clinical oversight of our medical director, Dr. Diego Delgado, and administered by trained injectors who assess each patient’s individual nasalis activity and facial anatomy before recommending a specific treatment plan. A provider who skips watching you smile or scrunch during the consultation, or who quotes a fixed unit count sight unseen, is worth a second opinion.
When a medical referral, not a med spa consultation, is the right next step
Most people considering bunny lines treatment are dealing with a straightforward cosmetic concern, and a med spa consultation is the appropriate starting point. There are situations, though, where the right next step is a physician rather than an aesthetic consultation: if what you’re describing is a new lump, asymmetric swelling, or a nasal change that’s recent and progressive rather than a longstanding expression-related crease, or if you have an existing neuromuscular condition that hasn’t been formally diagnosed. None of those should be treated with Botox before a physician has had a look. Botox does have genuine medical, non-cosmetic uses beyond aesthetics, and our page on medical uses of Botox gives a general overview of that distinction if it’s relevant to your situation.
Frequently asked questions
What does Botox in the bunny lines actually do?
It relaxes the nasalis muscle at the sides of the nose, the muscle responsible for the diagonal creases that appear when you smile broadly, laugh, or scrunch your nose. With the muscle contracting less forcefully, the skin over it stops folding the same way, and the lines soften.
Is bunny lines Botox worth it?
That depends entirely on how much the lines bother you and how you feel about the ongoing, temporary nature of the treatment. It’s a low-commitment way to find out, since a single treatment wears off within a few months either way, but it isn’t a permanent fix and needs repeat sessions to maintain.
Can Botox cause bunny lines?
Indirectly, yes, and this surprises a lot of people. Treating the forehead or glabella can shift some of your expressive muscle effort toward the nasalis, which sometimes makes bunny lines more noticeable than they were before, even though the lines themselves were likely always there to some degree.
Do bunny lines go away on their own?
Dynamic bunny lines, the ones that only appear during expression, typically fade when your face is at rest, since they’re driven by active muscle movement rather than a permanent fold. Static bunny lines, present even at rest, generally don’t fully disappear without treatment, since years of repeated folding combined with reduced skin elasticity have etched them in.
What can go wrong with bunny lines Botox?
The main risk specific to this area is diffusion of the toxin into the levator labii superioris, the muscle that lifts your upper lip, which can cause a temporary asymmetric smile or slight lip drooping. It’s uncommon with an experienced injector and resolves on its own as the Botox wears off.
How many units of Botox do I need for bunny lines?
Most patients need somewhere between 4 and 10 units total, often split as roughly 2 to 5 units per side, depending on how many creases you have and how strong the underlying muscle contraction is.
What is the riskiest place for Botox on the face?
Areas close to muscles controlling the mouth and eyelid, including the region around bunny lines, tend to carry a higher risk of visible asymmetry if the injection isn’t placed precisely, compared with larger, more forgiving areas like the forehead.
What is forbidden after Botox?
Nothing is strictly forbidden forever, but avoiding vigorous exercise, alcohol, lying flat, and rubbing the treated area for the first several hours reduces the chance of the product spreading beyond the intended muscle.
Is Botox four times a year too much?
Most people getting Botox in a single small area, including bunny lines, are treating every 3 to 4 months as the effect wears off, which works out to roughly three to four times a year. That’s a normal maintenance schedule rather than overuse, though your injector can help you figure out what interval genuinely suits how your muscle responds.
How long does it take for bunny lines Botox to kick in?
Most people notice initial softening within 3 to 5 days, with the full effect generally visible by 10 to 14 days after treatment.
How long do results last?
Typically around 3 to 4 months, similar to Botox in other small facial muscles, though individual metabolism and how many units were used can shift that window somewhat.
Does bunny lines Botox hurt?
Most patients describe it as a brief pinch rather than something painful. The injections are quick, and no sedation is used.
Can bunny lines Botox affect my smile?
When placed correctly by an experienced injector, it shouldn’t meaningfully change your smile. The rare risk, discussed above, is diffusion into the upper lip muscle, which is exactly what precise technique in this specific area is meant to prevent.
Is bunny lines Botox covered by OHIP or private insurance?
No. OHIP does not cover cosmetic Botox, including bunny lines treatment, since it’s an aesthetic rather than medically necessary indication.
Can bunny lines Botox be combined with other Botox areas in the same visit?
Yes, and it’s common, particularly alongside forehead or glabellar treatment, since bunny lines often become more noticeable after those areas are treated. Your injector will calculate total dosing across everything treated that day.
Will my bunny lines come back after Botox wears off?
Yes, the improvement is temporary and tied to how long the Botox remains active in the muscle, generally 3 to 4 months. The underlying tendency to form the creases doesn’t go away, so most patients who want to maintain the result return for repeat treatment.
Can dermal filler treat bunny lines instead of Botox?
Filler can sometimes soften the appearance of static creases by adding a small amount of volume, but it doesn’t address the muscle contraction that’s actually causing dynamic bunny lines, so it isn’t a direct substitute for most patients.
What’s the difference between bunny lines and 11 lines?
Bunny lines appear on the sides of the nose from nasalis contraction, while 11 lines are the vertical creases between the eyebrows caused by the corrugator and procerus muscles. They’re often discussed together since both can become more visible after treating the other, but they involve different muscles entirely.
How soon can I wear makeup or sunscreen after treatment?
Gentle application is generally fine once any pinpoint marks have settled, usually within a few hours, though it’s worth checking with your specific provider, since exact guidance can vary slightly by clinic.
Should I see a doctor instead of a med spa for changes on my nose?
If what you’re noticing is a new lump, asymmetric swelling, or a change that’s recent and progressive rather than a longstanding crease tied to smiling or scrunching, see a physician before considering cosmetic treatment. For straightforward, expression-related bunny lines, a med spa consultation is an appropriate starting point.
Bunny lines treatment is one part of our broader cosmetic injectables offering, and our injectable treatment FAQ covers general questions that apply across Botox and filler treatments if you’re still deciding where to start. If you’ve noticed diagonal creases on the sides of your nose, whether they showed up gradually or right after treating another area of your face, a consultation is a low-pressure way to find out whether Botox is a reasonable fit for what you’re specifically seeing. It doesn’t commit you to anything, and if it isn’t the right match for your particular pattern, we’ll say so directly.
