DAO Botox in Irvine, CA — Lifting Downturned Mouth Corners

DAO Botox in Irvine, CA — physician-performed relaxation of the depressor anguli oris for downturned mouth corners.

Result

DAO Botox in Irvine, CA: Lifting Downturned Mouth Corners

When the corners of the mouth turn down at rest, the face can look sad, tired, or stern even when you feel fine. Often the culprit is an overactive depressor anguli oris (DAO) — a small muscle that pulls the mouth corners downward.

At Spectrum Skin Clinic in Irvine, Dr. Sabeen Munib uses a few precise units of Botox to relax the DAO, allowing the corners to sit in a more neutral, lifted position.

DAO Botox in Irvine, CA: Lifting Downturned Mouth Corners

Spectrum at a glance

Starting priceGoogle ratingPatient reviewsPhysician-performedExperience
$14 / unit5.0★ Google441 (4.97★)100% — Dr. Sabeen Munib, MD15+ years

Spectrum Skin Clinic — Irvine

114 Pacifica, Suite 280, Irvine, CA 92618 · (949) 647-5234

Why patients choose Spectrum Skin Clinic for DAO Botox

The depressor anguli oris sits within a few millimetres of the orbicularis oris and the risorius, both of which are active in smiling and lip movement. Injecting too far medially or using too many units can affect these adjacent muscles and alter the smile or create asymmetry that takes several weeks to resolve. This is why DAO treatment requires a specific injection point — typically 1 to 2 cm lateral and inferior to the mouth corner — rather than a general zone approach.

Dr. Sabeen Munib assesses the resting expression and the dynamic smile together before placing any units. She evaluates whether the mouth-corner pull is bilateral or asymmetric, how strong the DAO is relative to the opposing zygomaticus minor, and whether there is a volume component that Botox alone will not address. The first-session dose is kept conservative — typically 2 to 4 units per side — to confirm the patient's response before any refinement at follow-up.

Every DAO treatment at Spectrum Skin Clinic is performed by Dr. Munib. No delegation, no technician protocol.

Medically advised by Dr. Sabeen Munib, MD.

Why patients choose Spectrum Skin Clinic for DAO Botox

How DAO Botox Works

The depressor anguli oris (DAO) is a paired muscle that originates along the mandible and inserts at the modiolus — the fibromuscular junction at the mouth corner. When this muscle contracts, it pulls the corner of the mouth downward. Over time, or in patients where the DAO is structurally dominant, this downward pull produces a consistently downturned resting expression even when the face is relaxed.

Botulinum toxin injected into the DAO inhibits acetylcholine release at the neuromuscular junction, preventing the muscle from fully contracting. This reduces the downward vector without eliminating it. The opposing lift muscles — primarily the zygomaticus minor — are unaffected, so the net result is a slight upward shift in the resting position of the mouth corners. The expression becomes softer and more neutral, not artificially upturned.

The typical dose is 2 to 4 units per side at one to two injection points below the mouth corner. Onset takes seven to fourteen days, and results typically last three to four months before the muscle recovers function and a maintenance session may be considered.

How DAO Botox Works

Why Precision Matters

The DAO injection point sits within a few millimetres of the depressor labii inferioris, which controls lower lip movement, and the orbicularis oris, which controls lip closure. An injection placed too medially can partially relax these adjacent muscles and produce temporary asymmetry in lip movement or difficulty drinking from a straw. These side effects resolve as the Botox wears off, but they are avoidable with accurate placement.

The dose matters as much as placement. An aggressive dose aimed at dramatic correction can over-relax the muscle and shift the smile asymmetrically in ways that cannot be reversed before the treatment wears off. Dr. Munib uses a conservative first-session dose — 2 to 4 units per side — with a review at two weeks. A small touchup can be added if appropriate. This approach is slower to a dramatic result but far less likely to produce a complication the patient must wait months to resolve.

Where DAO Botox Is Injected

DAO Botox is placed at one point on each side, low and lateral to the corner of the mouth — roughly a centimetre below and slightly outside the commissure, where the depressor anguli oris runs toward the jaw. Keeping the injection low, outer, and shallow holds the toxin away from the lip and smile muscles; too deep or too medial is what risks a temporary smile imbalance. Dr. Sabeen Munib confirms the point at rest and on a controlled frown, and usually one point per side is enough — the aim is the smallest effective dose at the most accurate point, not a fixed protocol for every face.

Botox, Dysport, and Xeomin are all botulinum toxin type A but diffuse and dose somewhat differently. For a small muscle this close to the smile the spread a product produces matters, and Dr. Munib will discuss which neuromodulator suits a delicate perioral area — see our Dysport vs. Botox guide. Placement and dosing here follow the onabotulinumtoxinA prescribing information and peer-reviewed lower-face botulinum-toxin guidance.

Combined Approaches

ConcernOften pairs withWhy
Downturned corners plus marionette foldsDAO Botox + conservative fillerBotox softens pull; filler supports fold structure
Lower-face heavinessDAO Botox + chin/jawline assessmentThe mouth corners and lower-face contour often interact
Asymmetric smile pullDAO Botox alone or staged treatmentStaging avoids overcorrecting a delicate expression area

Who May Be a Candidate

DAO Botox may suit patients whose mouth corners turn down at rest or who feel they look sad or angry when relaxed. It is often considered alongside marionette-area concerns.

Whether it is appropriate, and whether it should be combined with other treatments, depends on your anatomy and goals.

Good fit: downturned mouth corners driven by DAO muscle pull, and asymmetry that changes with expression — when you want to subtly lift the corners of the mouth without filler.

Usually not enough on its own: heavy jowling, skin laxity, or deep marionette folds from volume loss, which often need filler or a combined plan.

How Dr. Munib decides: your smile, frown, and resting mouth are assessed together, the dose kept conservative to avoid smile imbalance, and DAO strength separated from marionette-line structure.

What to Expect & Timeline

A DAO Botox appointment at Spectrum Skin Clinic takes fifteen to twenty minutes. Dr. Munib marks the injection points at rest and with the patient making a controlled smile, confirming the DAO's position before treating. The injection uses a fine-gauge needle at one to two points per side. Most patients experience minimal discomfort — a brief pinch — and topical numbing is not required.

Redness or a small raised area at the injection site is normal immediately after and resolves within thirty to sixty minutes. Bruising is possible but typically mild, resolving within five to seven days. Normal activity resumes immediately; pressing on the treated area or lying face-down for two to four hours is avoided.

The visible lift builds over seven to fourteen days as the DAO relaxes. Most patients notice the change in their resting expression around day ten. Results last three to four months. Consistent maintenance prevents the muscle from fully recovering its baseline tone between sessions.

Safety and Who May Not Be a Candidate

DAO Botox is avoided in pregnancy and breastfeeding. Patients with neuromuscular conditions such as myasthenia gravis or Lambert-Eaton syndrome are not candidates. Patients taking medications that affect neuromuscular transmission — including certain aminoglycoside antibiotics — should disclose these at consultation, as they can potentiate the effect of botulinum toxin.

The most common adverse outcome specific to DAO Botox is an asymmetric smile or temporary difficulty with mouth movement — both of which reflect placement outside the intended zone or a dose that was too high for the individual patient's anatomy. These resolve over eight to twelve weeks as the toxin wears off. Reporting any unexpected change in lip movement within the first two weeks allows Dr. Munib to assess and document the response for future planning.

A consultation confirms whether DAO Botox is appropriate for your anatomy and goals. Patients with significant jowling, deep marionette folds, or volume loss at the mouth corners may need a combined plan rather than Botox alone.

Aftercare & Recovery

Essentially no downtime — most patients return to normal activity the same day.

First few hours: stay upright; avoid pressing the mouth corners or lying face-down.

First day: skip strenuous exercise, saunas, and alcohol to limit bruising.

Redness settles within an hour; any bruising fades in about a week. The lift builds over one to two weeks.

What Affects Your Cost

Priced per unit, and the area uses only a few units per side — one of the smaller Botox treatments by dose.

Your total depends on units needed, one side or both, and any combination with another area like the chin.

A volume-driven downturn may also need filler, priced separately. Dr. Munib confirms the estimate at consultation.

Will DAO Botox Change My Smile?

Placed correctly, it should not change your smile — it relaxes only the muscle that pulls the corners down.

An uneven smile comes from too high a dose or placement too near the lip muscles — both avoidable with conservative dosing.

Dr. Munib starts low (2 to 4 units per side) and reviews at two weeks; any temporary asymmetry resolves as the Botox wears off.

Related Treatments

DAO Botox is one of several lower-face and mouth-area treatments Dr. Munib offers. The Botox overview covers the neuromodulator across areas, while Masseter Botox slims the jaw, Chin Botox smooths a pebbled chin, the Nefertiti Lift redefines the jaw and neck, and a Lip Flip or Gummy Smile Botox refines the smile itself.

When the downturn is also driven by volume loss, filler is often paired with the injections: Marionette Lines Filler supports the mouth-to-chin fold, Lip Filler restores the mouth area, and our Dermal Fillers overview explains the materials. Dysport is an alternative neuromodulator. Dr. Munib will advise which, if any, fits your goals.

Book a DAO Botox Consultation in Irvine

If downturned mouth corners are bothering you, a consultation with Dr. Sabeen Munib starts by identifying what is driving the downturn and whether DAO Botox — alone or combined — is a reasonable option. Book at Spectrum Skin Clinic in Irvine, CA.

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