Corners of the Mouth

This area affects expression and can contribute to a downturned or unhappy appearance when it becomes heavy or pulls downward.

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Related Concerns
 concerns
Related Treatments
Treatments
Region
Face
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About this area

The Corners Of The Mouth Tell The Face What Mood It's In.

The oral commissures — the corners of the mouth — are controlled primarily by the depressor anguli oris (DAO), a triangular muscle that pulls the mouth corners downward. As the DAO becomes hyperactive or as the overlying tissue loses support, the corners of the mouth descend, creating a downturned appearance that reads as sadness, displeasure, or fatigue regardless of the patient's actual mood.

The marionette lines — the vertical creases running from the mouth corners toward the chin — form as the tissue below the commissure loses support and the DAO continues pulling downward. The combination of downturned corners and marionette lines is one of the most expressive aging changes in the lower face.

Related Concerns

When the corners turn down, the whole face looks like it has something to say.

Treatments for this area

What Can Be Done For The Corners Of The Mouth.

The oral commissures — the corners of the mouth — are controlled primarily by the depressor anguli oris (DAO), a triangular muscle that pulls the mouth corners downward. As the DAO becomes hyperactive or as the overlying tissue loses support, the corners of the mouth descend, creating a downturned appearance that reads as sadness, displeasure, or fatigue regardless of the patient's actual mood.

The marionette lines — the vertical creases running from the mouth corners toward the chin — form as the tissue below the commissure loses support and the DAO continues pulling downward. The combination of downturned corners and marionette lines is one of the most expressive aging changes in the lower face.

Related treatments

When the corners turn down, the whole face looks like it has something to say.

How It Changes Over Time

Downturned Corners Are A Muscle Story And A Volume Story Simultaneously.

20s
30s
40s
50s+

Commissures neutral to slightly upturned; marionette lines absent at rest.

Early downturning in patients with strong DAO; faint marionette lines develop.

Downturned corners and marionette lines established as resting features.

Deep downturning and marionette lines with lower face volume loss compounding severity.

In Your 20s

Mouth corners are neutral or slightly upturned. The DAO is active but the surrounding tissue provides sufficient support to maintain a natural, non-downturned position.

In Your 30s

Early downturning may begin in patients with strong DAO activity. Subtle marionette lines form from volume loss in the lower face.

In Your 40s

Downturned corners become a resting feature. Marionette lines deepen as lower face volume declines and the DAO pulls more unopposed.

In Your 50s+

Established downturned commissures with deep marionette lines. Lower face volume loss and bone resorption in the mandible compound the appearance.

Why Patients Treat This Area

Patients come in when people ask them why they look sad.

01

Restore a neutral mouth position that doesn't read as sad or stern at rest

02

Soften the marionette lines that compound the heavy lower face appearance

03

Change the default expression of the lower face to something that matches how the patient actually feels

We Relax What Pulls Down. We Restore What Used To Hold It Up.

Treatment at CAMI addresses both components: the DAO muscle with a small wrinkle relaxer dose to reduce the downward pull, and the tissue below the commissure with filler to restore the structural support that used to counteract it.

The DAO relaxer dose is intentionally small — too much creates an unnatural smile. Filler in the marionette lines is placed conservatively to soften the crease without overfilling the lower face. The combination of both approaches typically produces the most natural and complete result.

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CAMI provider performing treatment at the corners of the mouth for downturned smile correction

FAQ

What's the best treatment for downturned mouth corners?
Can marionette lines be treated at the same time as mouth corners?
Are mouth corners and marionette lines treated together?