Yes, Botox can lift downturned mouth corners, but only when overactive muscle pull is the main cause. Injecting the depressor anguli oris (DAO) relaxes that downward tug, producing a subtle, natural-looking lift rather than a dramatic change. Most people notice movement within several days, with the full effect visible by about two weeks, and results typically last a few months. It won’t restore lost volume or tighten loose skin, so a proper assessment matters before you book.
TL;DR:
- The typical dose for DAO Botox starts around 2 units per side, injected laterally or inferolaterally to the mouth corner to prevent diffusion into nearby muscles.
- The full effects of Botox on downturned mouth corners appear in about two weeks and usually last three months, making a two-week review essential for adjustments.
- Proper assessment should confirm muscle overactivity as the cause, as Botox won’t improve volume loss or loose skin, which may require fillers or skin tightening.
- Injecting too deeply or medially risks affecting surrounding muscles like the depressor labii inferioris, causing lower-lip weakness or asymmetry, so precise location mapping is crucial.
- Treatments are most successful when performed by a doctor experienced in facial anatomy, with staged adjustments during follow-up to achieve a natural, balanced result.
Table of Contents
- Understanding the DAO and Why Anatomy Drives Downturned Mouth Botox
- Are You a Good Candidate for DAO Botox?
- What Happens During a DAO Botox Appointment?
- How Much Botox Does DAO Treatment Actually Require?
- What Are the Risks of DAO Botox and How Are They Prevented?
- When Will You See Results and How Do You Care for Them Afterward?
- Do You Need Fillers Too, Not Just Botox?
- Why an Anatomy-First, Doctor-Led Clinic Matters Here
- What I’d Tell a Patient Considering This Treatment
- Book an Anatomy-Led Consultation for Your Mouth Corners
- Sources
- FAQ
Understanding the DAO and Why Anatomy Drives Downturned Mouth Botox
The depressor anguli oris is a small, triangular muscle that runs from the jawline up to the corner of the mouth. When it fires, it pulls the mouth corners down and inward, which is exactly what creates that “sad” or perpetually unimpressed look even when you’re not upset. Cadaver studies place the muscle only 0.25 to 0.4 centimeters beneath the skin at the oral commissure, which is shallow enough that placement precision genuinely changes the outcome, not just the marketing copy around it.
The DAO doesn’t work alone. It sits close to several structures that a clinician has to account for before ever picking up a needle:
- Depressor labii inferioris (DLI), which sits medially and controls lower lip movement, is the muscle most at risk if injections drift too far inward.
- Risorius, which pulls the corner of the mouth sideways during a smile, overlaps the DAO’s territory in some faces.
- Modiolus, the muscular convergence point at the mouth corner, anchors several expression muscles and can shift the whole pull pattern if the DAO is imbalanced against it.
- Platysma, the neck muscle that can contribute to jowl and jawline heaviness, sometimes shares fibers with the lower DAO.
Hyperactivity isn’t always symmetrical. One side often pulls harder than the other, which is why an experienced injector maps each side independently rather than mirroring a standard dose across the face. Botulinum toxin diffuses roughly 1 centimeter from the injection point, with wider spread at higher doses, according to the same anatomical research. That diffusion radius is the entire argument for injecting lateral or inferolateral to the corner of the mouth rather than dead center. Go too medial or too deep, and the toxin can migrate into the DLI, which is where lower-lip complications start.
Are You a Good Candidate for DAO Botox?
Downturned mouth Botox works best on a specific type of face: one where the muscle is doing the damage, not gravity or lost fat pads. Before you book a consultation, it helps to know which category you fall into.
Good candidates typically show these signs:
- A visible downward pull at the mouth corners that gets more pronounced when the muscle is deliberately activated (try clenching your jaw and watch your mouth corners in a mirror).
- Reasonably intact skin elasticity and minimal volume loss around the lower cheek and jawline.
- General good health, with no neuromuscular conditions like myasthenia gravis and no pregnancy or breastfeeding.
- Realistic expectations about a subtle result rather than a dramatic lift.
Some situations call for caution or a different plan altogether. Neuromuscular disorders, active skin infections near the injection site, and known allergy to botulinum toxin products are firm contraindications. Beyond that, a simple palpation test tells you a lot: if you pinch the skin along the marionette line and it stays creased or hollow even at rest, you’re likely dealing with volume loss and structural sag rather than pure muscle pull, and Botox alone won’t move the needle much.
That’s where alternative or combination treatments enter the conversation. Dermal fillers restore lost structural support along the marionette lines and prejowl area. Skin boosters improve overall skin quality and elasticity over a course of sessions. Energy-based skin tightening addresses looser tissue that toxin can’t touch. A PMC review of perioral techniques notes that when muscle pull and volume loss coexist, staged combination treatment usually produces a more balanced result than chasing everything with a single tool.
What Happens During a DAO Botox Appointment?
A downturned mouth Botox appointment should feel more like a clinical assessment than a walk-in transaction. Here’s the typical sequence at a properly run clinic:
- Consultation and history. Your practitioner reviews your medical history, medications, and any previous injectable treatments, and asks what specifically bothers you about your mouth corners.
- Assessment at rest and animation. You’ll be asked to relax your face, then clench or purse your lips, so the injector can watch the DAO fire and compare both sides. This is also when photo documentation happens, both for your records and to track change at review.
- Mapping. The injector marks external landmarks, usually along the jawline below the corner of the mouth, staying lateral or inferolateral to the commissure to keep clear of the DLI.
- Injection. Using a fine needle, small aliquots are placed at the marked points. Most people describe a quick pinch or sting rather than significant pain.
- Immediate aftercare instructions. You’ll be told to stay upright for several hours, avoid rubbing the area, and skip strenuous exercise for the rest of the day.
- Two-week review booking. Because full effect takes about two weeks to show, a properly run clinic schedules a follow-up rather than leaving you to guess whether it “worked.”
The whole appointment, consultation included, usually runs 30 to 45 minutes, with the injection itself taking only a few minutes.
Pro Tip: Bring a short video of yourself talking and smiling naturally to your consultation. Static photos miss the dynamic pull that actually causes the downturned look, and it helps your injector map the muscle more accurately.
How Much Botox Does DAO Treatment Actually Require?
Conservative dosing is the standard for a reason: the DAO sits close to muscles that control lip movement and speech, and overcorrection is far easier to cause than to reverse. Clinical guidance from Dr Dray Academy recommends starting around 2 units per side as a baseline, then adjusting at the two-week review rather than trying to nail the perfect dose in one sitting.
Typical practice looks like this:
- 1 to 2 injection points per side, placed lateral or inferolateral to the mouth corner.
- 2 to 3 units per point, based on the anatomical placement studies referenced above.
- Micro-aliquot technique when the muscle belly is broad or the pull is more diffuse, spreading a similar total dose across more, smaller injections rather than one larger bolus.
Why the low starting dose matters: Diffusion studies show that larger injected volumes spread further from the injection site, with animal research recording spread of several centimeters at higher unit doses. Since the DAO sits just above the DLI, a dose calculated for maximum diffusion control protects lower-lip function far better than one calculated for maximum muscle relaxation.
Adjustments around two weeks after treatment are normal. If one side shows more residual pull, a small top-up on that side alone typically resolves the asymmetry without touching the side that already responded well.
What Are the Risks of DAO Botox and How Are They Prevented?
The most commonly reported issues with downturned mouth Botox are smile asymmetry and temporary lower-lip weakness, which can make speech or eating feel slightly odd for a few weeks. Bruising at the injection site happens occasionally, as with any needle-based treatment.
Most complications trace back to injections placed too medially or too deep, letting toxin reach muscles near the DAO rather than staying confined to the target muscle. Harley Academy’s clinical guidance points to poor initial assessment, rather than technique alone, as the more common failure point. Missing a patient’s natural asymmetry, or not testing the muscle during animation, leads to dosing decisions that don’t match the actual anatomy in front of the clinician.
Prevention comes down to a short list of habits any competent injector should follow:
- Map the DAO at both rest and animation before marking injection points.
- Stay lateral or inferolateral to the oral commissure, never medial.
- Start with a conservative dose and treat the two-week review as part of the plan, not an afterthought.
- Use ultrasound guidance in complex or asymmetric cases where the muscle borders aren’t obvious externally.
If you notice drooling, slurred speech, or a smile that looks noticeably crooked in the days after treatment, contact your clinic rather than waiting it out. Most functional side effects resolve as the toxin wears off, but a clinician should assess anything that affects eating or speaking clearly.
Pro Tip: Ask your injector directly how they handle asymmetry at review. A clinic that already has a plan for small touch-ups signals they expect to fine-tune, not just inject and send you home.
When Will You See Results and How Do You Care for Them Afterward?
Change from downturned mouth Botox shows up gradually. Most patients notice the first shift around day 3 to 7, with the full effect settling in by roughly two weeks, matching the typical onset window reported across clinical sources. The result usually lasts about three months, though this varies by metabolism, muscle mass, and dose.
Aftercare in the first 24 to 48 hours is straightforward but worth following closely:
- Avoid rubbing, massaging, or applying pressure to the treated area.
- Skip strenuous exercise, saunas, and hot yoga for the rest of the treatment day.
- Stay upright for several hours after injection rather than lying flat.
- Hold off on facial treatments like microdermabrasion until your clinic confirms it’s fine.
Specific timing can vary slightly by clinic, so it’s worth checking your provider’s own aftercare guidance before you leave the appointment.
Book your two-week review even if you think the result looks good. This is when a clinician can see the muscle at full relaxation, catch any lingering asymmetry, and make small adjustments if needed. Taking a “before” photo under consistent lighting, then repeating it at two weeks and again at three months, is the easiest way to actually see the subtle change rather than second-guessing yourself in the mirror.
Do You Need Fillers Too, Not Just Botox?
If your downturned mouth is driven by both muscle pull and lost structural support, Botox alone will only get you partway there. The clinical logic is straightforward: toxin relaxes the muscle causing the pull, while filler rebuilds volume the muscle can’t restore no matter how relaxed it becomes.
Common combination targets include:
- Marionette lines, the grooves running from the mouth corners toward the chin, often softened with filler placed along the line.
- Prejowl sulcus, the hollow just in front of the jawline that can make the jaw look less defined.
- Lateral cheek support, which indirectly affects how much the mouth corners appear to droop.
Sequencing typically favors treating the muscle first, then reassessing at the two-week review before deciding whether filler is genuinely needed or whether the toxin already solved most of the problem. This staged approach, supported by clinical literature on perioral treatment, avoids overtreating a face that only needed one intervention.
Filler around the mouth carries its own risk profile, mainly the vascular risk near the labial and facial arteries. Anatomy training and, in some clinics, ultrasound guidance during injection reduce that risk considerably, and this is where safe lip and perioral filler technique becomes just as important as safe Botox mapping. Combination plans also mean two maintenance schedules to track rather than one, since filler and toxin wear off at different rates.
Why an Anatomy-First, Doctor-Led Clinic Matters Here
Downturned mouth Botox is unforgiving of guesswork. Given how close the DAO sits to muscles controlling lip movement and speech, the injector’s understanding of facial anatomy matters as much as the product itself. The clinic was founded by a GMC-registered, level 7 qualified medical doctor, with clinics in London and South Oxfordshire.
Every treatment is performed personally by Dr Pavey rather than delegated across a rotating team, which matters for a procedure where mapping at rest and animation, not just the injection itself, determines the outcome. That model, doctor-performed assessment paired with a genuine review appointment, mirrors exactly the conservative, anatomy-first approach clinical guidance recommends for DAO work. You can review the full range of injectable treatments, including anti-wrinkle injections, before booking a consultation.
What I’d Tell a Patient Considering This Treatment
The honest gap in most downturned mouth Botox marketing is the word “fix.” Botox doesn’t fix anything structural. It relaxes a muscle, and if that muscle is genuinely the source of your downturned corners, the change can be meaningful without ever looking obvious to anyone but you.
What frustrates me about how this treatment gets discussed online is the implication that one syringe solves a lower-face problem that’s often multifactorial. A good injector will sometimes tell you Botox isn’t enough, or that you need a smaller dose than you expected, and that’s not a sales tactic. It’s the anatomy talking. Walk into your consultation with questions about dosing philosophy and how asymmetry gets handled at review. Those two questions tell you more about a clinic’s competence than any before-and-after photo ever will.
— Anthony
Book an Anatomy-Led Consultation for Your Mouth Corners
This clinic offers treatments performed personally by a level 7 qualified doctor, with real consultation time to assess whether your downturned mouth is muscle-driven, volume-driven, or both before any needle comes out.
At your first appointment, expect a proper assessment at rest and during animation, photo documentation, and a mapped plan tailored to which side of your face pulls harder. Anti-wrinkle injections start from £249 for one area, with three areas priced at £399, and every plan includes the two-week review built into the safety-first approach this guide has walked through. If your mouth corners droop more from muscle pull than lost volume, browse the full treatments page and book a consultation to find out which approach actually fits your face.
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
- Points of botulinum neurotoxin for targeting depressor anguli oris muscle (Anat Cell Biol 2023)
- DAO Botox: How It Helps Downturned Mouth Corners
- DAO Botox: Treating a Down-Turned Mouth Safely & Effectively – Dr Dray Academy
- Treating a Down-Turned Mouth with Botox (DAO) — Harley Academy
FAQ
Can You Fix a Downturned Mouth With Botox?
Botox can lift downturned mouth corners when overactive muscle pull from the DAO is the main cause, producing a subtle rather than dramatic change. It won’t correct downturned corners caused mainly by volume loss or loose skin, which usually need filler or skin-quality treatment instead.
What Is the Riskiest Placement for DAO Botox?
Injecting too medially or too deep near the mouth corner is the riskiest placement, since it risks affecting the depressor labii inferioris and causing lower-lip weakness. Staying lateral or inferolateral to the commissure, as recommended in anatomical placement studies, keeps the toxin confined to the DAO.
Can DAO Botox Cause Jowls?
DAO Botox itself doesn’t cause jowls, but relaxing the muscle can occasionally make existing lower-face volume loss or skin laxity more visible by removing the muscle’s competing pull. This is why a proper pre-treatment assessment for volume loss matters before injecting, and why some patients are better suited to combination treatment.
Can DAO Botox Go Wrong?
Yes, though most issues are temporary and stem from injections placed too medially, too deep, or at too high a dose. The Harley Academy’s clinical guidance points to inadequate initial assessment as a more common cause of poor outcomes than injection technique alone, which is why anatomy mapping and a two-week review appointment are standard at a competent clinic.
How Much Does DAO Botox Cost?
Pricing depends on how many areas are treated during your appointment. At Thegoodskinclub, anti-wrinkle injections for one area start at £249, with two areas at £329 and three areas at £399, all detailed on the treatments page.
