Yes, Botox can soften dynamic bunny lines, but only when it’s placed along muscle borders rather than injected straight into the crease you see when you scrunch your nose. Newer anatomy work supports conservative micro-dosing, a small number of onabotulinumtoxinA-equivalent units spread across a few precise points, to smooth the lines while keeping the smile and upper lip unaffected. Because this use sits outside the approved label for every major neurotoxin brand, the injector’s anatomical knowledge and your informed consent matter as much as the product itself.
TL;DR:
- Using conservative micro-dosing along the muscle borders is key to effectively softening bunny lines without affecting the upper lip or smile.
- Injecting into the non-muscular triangle beneath the crease prevents wasting product and targets the actual muscle that causes the Lines.
- Dosing typically ranges from 4 to 8 units, with a staged approach recommended to review results at two weeks before increasing.
- Complications like lip weakness or eyelid changes are minimized by low-volume, precise injections and staged treatment plans.
- Off-label use requires detailed anatomical knowledge and informed consent, emphasizing the importance of an experienced, qualified injector.
Table of Contents
- What Are Bunny Lines and Why Do They Form?
- How Does Botox Work on Bunny Lines?
- Where Should the Injections Go?
- What Complications Should You Watch For?
- What Happens After Treatment?
- What to Ask Before You Book a Consultation
- Does Everyone Get the Same Injection Pattern?
- Is Botox the Only Option for Bunny Lines?
- What Should You Realistically Expect From Treatment?
- How Much Does Bunny-Line Botox Cost?
- A Clinician’s View on Getting This Right
- Book an Anatomy-Led Bunny-Line Consultation
- Sources
What Are Bunny Lines and Why Do They Form?
Bunny lines are the diagonal or vertical creases that appear across the bridge of your nose when you scrunch it, laugh hard, or squint into the sun. Some people only notice them mid-expression; others see faint static lines even at rest, usually a sign the skin has spent years folding along the same path.
The muscles responsible sit in a tight, overlapping cluster. The transverse nasalis pulls the skin of the nasal bridge into those horizontal folds, while the procerus (between the brows) and the levator labii superiors alaeque nasi, usually shortened to LLSAN, contribute pull from above and below. Orbicularis oculi, the muscle ringing your eye, can add to the pattern when you squint. For decades, injectors treated this as one continuous muscular sheet and aimed for the visible crease itself.
Cadaveric dissection and ultrasound imaging changed that picture. Research examining 13 adult volunteers by ultrasound and 39 cadaveric specimens identified a non-muscular “bunny triangle” sitting beneath the crease, a gap between procerus, nasalis, orbicularis oculi, and LLSAN with no muscle fiber to block. Inject the crease directly and you may be depositing toxin into connective tissue that was never contracting in the first place.
That anatomy also explains a pattern many patients find confusing:
- Bunny lines can appear or worsen after glabellar or forehead Botox, not because the treatment failed but because the nasalis compensates for muscles that can no longer move.
- This compensatory activation is a known clinical pattern, not a sign that something went wrong with your original treatment.
- It’s one reason experienced injectors ask about your full upper-face history before planning a nose treatment.
How Does Botox Work on Bunny Lines?
Botulinum toxin type A blocks the release of acetylcholine at the neuromuscular junction, so the treated muscle temporarily stops receiving the signal to contract. Applied to nasalis and its neighbors, that means less pull across the nasal bridge and fewer visible folds when you laugh or scrunch your nose.
Most patients notice softening within 3 to 7 days, with the full effect settling in around the two-week mark, a timeline consistent with BoNT-A studies across other facial areas. Duration typically runs 3 to 4 months, though individual metabolism, muscle mass, and dosing all shift that window. No large randomized trial has specifically tracked nasalis duration, so these figures are extrapolated from broader facial treatment data rather than a bunny-line-specific study.
Off-label use, plainly stated: no major neurotoxin manufacturer lists nasalis or bunny lines as an approved indication on its product label. Reviews in the Journal of Cosmetic Dermatology confirm this gap across the field. “Off-label” doesn’t mean unsafe or unusual, plenty of widely used cosmetic injections fall outside strict label wording, but it does shift responsibility onto the injector’s judgment rather than a manufacturer’s tested protocol. That’s exactly why anatomy knowledge and a documented consent conversation matter more here than in a standard, on-label treatment area.
Where Should the Injections Go?
The practical shift in technique is simple to describe and easy to get wrong without training: aim for the superior border of the transverse nasalis, not the visible fold itself. Because the crease often sits over that non-muscular triangle, injecting it directly can waste product and under-treat the muscle actually causing the movement.
A conservative, evidence-informed approach usually looks like this:
- Transverse nasalis, superior border: 1 to 2 units per point, placed bilaterally.
- LLSAN, supermedial margin: optional adjunct of 0.5 to 1 unit where the fold extends toward the cheek.
- Procerus margin: an optional 1 unit if central glabellar pull is contributing to the pattern.
- Total dose: commonly 4 to 8 onabotulinumtoxinA-equivalent units, according to clinical practice syntheses summarizing recent anatomy-guided protocols.
Marking typically falls 1 to 1.5 centimeters lateral to the medial canthus, with the needle kept superficial, roughly 1.5 to 2.0 millimeters deep, to stay in muscle rather than drifting toward orbital structures. Dysport, Xeomin, and other brands are not unit-for-unit interchangeable with onabotulinumtoxinA, so any dose your injector quotes should specify which product it refers to.
Pro Tip: Ask your injector to start conservative and review you at two weeks before adding more product. Bunny lines respond well to staged dosing, and topping up after seeing the actual result beats guessing the full dose upfront.
What Complications Should You Watch For?
The complications tied to bunny-line Botox trace directly back to the crowded anatomy in that part of the face. Nothing here is exotic, but the margin for error is smaller than in areas like the forehead.
- Upper-lip drop or smile asymmetry. Toxin that diffuses into LLSAN or the levator labii can weaken the muscles that lift your upper lip, an effect linked to diffusion patterns documented in clinical complication reports.
- Eyelid or lacrimal pump changes. Orbicularis oculi sits close enough to the injection zone that overly generous dosing or poor placement can affect blinking or tear drainage.
- Prevention comes down to restraint. Low-volume micro-doses, strict boundaries lateral and medial to the marked points, shallow needle depth, and a staged dosing plan all reduce the odds of either complication.
- If something feels off, don’t panic. These effects fade as the toxin wears off over the following weeks, and most resolve fully without intervention. Contact your clinician promptly if you notice lip weakness or asymmetry so they can document it and advise on timeline.
What Happens After Treatment?
The first 24 to 48 hours call for a few sensible precautions: skip vigorous rubbing of the treated area, avoid lying flat if your clinician advises sleeping semi-upright the first night, and hold off on blood-thinning supplements like high-dose fish oil unless you’ve already cleared it with them.
- Early softening often shows up within the first few days.
- Peak effect settles around the two-week mark.
- Most patients need a repeat session every 3 to 4 months to maintain results.
Book your follow-up around that two-week point rather than immediately. That’s when your injector can see the actual result and decide whether a small touch-up makes sense, instead of adding units on day one based on guesswork. If you’re combining bunny-line treatment with a broader upper-face plan, discuss how crow’s feet or glabellar treatment might shift muscle balance and change what your nose does in response.
What to Ask Before You Book a Consultation
A short checklist protects you far better than trusting a clinic’s marketing copy. Bring these questions to any consultation:
- What is your medical qualification, and how much experience do you have specifically with nasal anatomy and bunny-line treatment?
- Can you walk me through your planned dosing points before we start?
- Will I sign an off-label informed consent form, and do you document your injection plan?
- What does your review and touch-up policy look like?
Walk away from any injector who proposes a large first-pass dose straight into the visible crease, skips a review appointment, or can’t explain the muscular anatomy they’re targeting. Non-medical injectors who deflect anatomy questions are a clear red flag. At Thegoodskinclub, treatments are performed by Dr. Lydia Pavey, a Level 7 qualified medical doctor with clinics on Harley Street and in Wallingford, South Oxfordshire, an important distinction in a field where injector qualifications vary widely.
Does Everyone Get the Same Injection Pattern?
No, and this is where cookie-cutter protocols fail patients. Someone with a thin, high nasal bridge and mild dynamic lines needs a different plan than someone with a broader bridge, deeper static creases, and visible LLSAN pull toward the cheek.
Mild, purely dynamic bunny lines, the kind that vanish completely at rest, often respond to nasalis-only treatment at the lower end of the dose range. More pronounced cases, where lines persist even without expression, frequently need the LLSAN adjunct added to address the downward pull component, plus a longer conversation about expectations since static lines respond less completely to toxin alone.
Nasal bridge width matters too. A narrower bridge concentrates the muscle fibers closer together, so injection points sit closer to the midline and often need smaller individual doses to avoid overtreating a compact area. Wider bridges spread the muscle mass out, which can mean points spaced further apart with slightly more product per site.
Skin thickness and existing muscle tone also shift the plan. Patients who’ve had significant sun damage or who are older often show more static component, meaning Botox manages the dynamic contraction while the residual fold benefits from a separate conversation about skin quality rather than a bigger neurotoxin dose. There’s no universal number of units that fits every face, which is exactly why an anatomy-led consultation matters more here than in more standardized treatment areas.
Is Botox the Only Option for Bunny Lines?
Botox remains the primary tool for dynamic bunny lines because it addresses the actual cause, muscle contraction, rather than just the surface appearance. But it isn’t the only route, and knowing the alternatives helps you set realistic expectations.
Dermal fillers aren’t typically used to treat bunny lines directly since the lines are a movement problem, not a volume-loss problem, but fillers can play a supporting role when static creases persist after toxin has relaxed the muscle. In that scenario, a very conservative filler approach might soften a residual fold that Botox alone doesn’t fully erase, though this needs a clinician experienced in nasal anatomy given how vascular that region is.
Laser and energy-based treatments target skin texture and collagen quality rather than muscle movement. They can help with static lines and overall skin quality on the nasal bridge but do nothing for the underlying muscle contraction driving dynamic lines. Think of them as a complement to Botox for patients with significant static creasing, not a replacement.
For most people with genuine dynamic bunny lines, that scrunch-triggered creasing that disappears when the face is relaxed, Botox is the more direct and proportionate first step. The comparison worth making with your injector is less “Botox versus filler” and more “does this need toxin alone, or toxin plus a secondary treatment for residual static lines.”
What Should You Realistically Expect From Treatment?
Bunny-line Botox softens movement lines; it doesn’t erase every trace of a crease that’s been forming for years. Setting that expectation before treatment prevents the disappointment that comes from comparing your result to a filtered photo online.
Dynamic lines, the ones that show up only when you scrunch your nose, respond the most reliably. Static lines that remain visible at rest often improve but rarely disappear completely with toxin alone, since a mechanically relaxed muscle doesn’t instantly reverse skin that’s creased along that path for a decade. Patients with early, purely dynamic lines and younger skin tend to see the cleanest results.
A good consultation walks you through your own bunny-line pattern honestly: whether your lines are fully dynamic, partly static, or influenced by compensatory activity from a previous glabellar treatment. It should also cover realistic timing, first results within days, full effect at two weeks, and a maintenance rhythm around every 3 to 4 months rather than a one-and-done fix.
Ask your injector directly what result they expect for your specific anatomy rather than accepting a generic promise of “smooth skin.” A clinician who gives you a nuanced, individualized answer is a better sign than one who guarantees total elimination of every line on the first visit.
How Much Does Bunny-Line Botox Cost?
Pricing for bunny-line treatment tends to sit lower than larger treatment areas simply because the dose is small, often only 4 to 8 units total compared to the 20 or more units common in a full forehead or glabellar treatment.
Most UK clinics price Botox per area or per unit rather than as a flat national rate, and bunny lines are frequently bundled into a broader upper-face consultation rather than quoted as a standalone line item. Because dosing is so conservative here, the treatment itself is rarely the most expensive part of a visit, the consultation and injector expertise are what you’re really paying for, given the off-label nature of the technique and the anatomical precision it demands.
If you’re weighing cost, it’s worth asking whether bunny-line treatment can be added to a session you’re already booking for crow’s feet or glabellar lines, since combining areas in one appointment often makes more financial sense than a separate visit purely for the nose. Exact pricing varies by clinic and by how much product your specific anatomy requires, so ask for a personalized quote during consultation rather than relying on a number you saw quoted elsewhere.
A Clinician’s View on Getting This Right
The single biggest shift in how bunny lines get treated well isn’t a new product, it’s restraint. Border-targeted micro-dosing produces more natural results and fewer complications than the older habit of chasing the visible crease with a bigger dose. Smaller, well-placed amounts of toxin in the right muscle plane consistently outperform larger amounts in the wrong spot.
Not every case resolves with toxin alone. Patients with genuinely static, long-established creases sometimes need an honest conversation about adjunctive treatments rather than a promise that more units will fix it. The conservative approach, treat modestly, review at two weeks, adjust from there, gives the most reliable outcomes because it respects how tightly packed and individually variable this anatomy really is.
— Anthony
Book an Anatomy-Led Bunny-Line Consultation
Thegoodskinclub treats bunny lines the way the newest anatomy research actually recommends: border-targeted micro-dosing planned around your specific facial structure, not a generic crease injection copied from a training manual. That distinction matters most in an off-label area where injector judgment, not a manufacturer’s protocol, determines your outcome.
Dr. Lydia Pavey, a Level 7 qualified medical doctor, sees patients at clinics on Harley Street in London and in Wallingford, South Oxfordshire, and builds every bunny-line plan around your individual nasal anatomy, expression pattern, and any prior upper-face treatment. A consultation covers your dosing plan, off-label consent, and a realistic timeline before a single unit gets injected. If you’re also considering combined treatment for crow’s feet or forehead lines, that’s worth raising at the same visit.
Ready to see what an anatomy-guided plan looks like for your face? Book a consultation for anti-wrinkle injections and get a dosing plan built around your own bridge width, expression pattern, and treatment history.
This article is general information, not a substitute for advice from a qualified doctor. Consult a qualified healthcare professional about your own circumstances before acting on anything here.
Sources
- Anatomical etiology of bunny lines based on cadaveric dissection and ultrasonographic evaluation
- Influence of botulinum toxin type A esthetic injections on facial expressions. Journal of Cosmetic Dermatology. 2026;25(1):e70673
- Bunny Lines Botox: Where the New Anatomy Says to Inject (and Why the Label Does Not) · AestheticMedGuide
