Frown Lines

The “11s” between the brows are one of the most common expression-related areas and can make the face appear tense, tired, or stressed.

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Related Concerns
 concerns
Related Treatments
Treatments
Region
Face
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About this area

The Frown Lines Are Where The Face Holds Its Tension.

The frown lines — the vertical lines between the brows, commonly called the 11s — are produced by two muscles: the corrugator supercilii and the procerus. The corrugators draw the brows inward and downward; the procerus pulls the nasal bridge skin upward. Together they create the characteristic vertical and horizontal creasing of the glabella.

Because these muscles activate with concentration, concern, disapproval, and bright light — essentially any moment of cognitive or visual effort — they are among the most frequently used expressive muscles on the face. That frequency is why frown lines tend to etch earlier and more deeply than most other expression lines.

Related Concerns

The 11s are the lines that make a resting face look like a judgmental one.

Treatments for this area

What Can Be Done For Frown Lines.

The frown lines — the vertical lines between the brows, commonly called the 11s — are produced by two muscles: the corrugator supercilii and the procerus. The corrugators draw the brows inward and downward; the procerus pulls the nasal bridge skin upward. Together they create the characteristic vertical and horizontal creasing of the glabella.

Because these muscles activate with concentration, concern, disapproval, and bright light — essentially any moment of cognitive or visual effort — they are among the most frequently used expressive muscles on the face. That frequency is why frown lines tend to etch earlier and more deeply than most other expression lines.

Related treatments

The 11s are the lines that make a resting face look like a judgmental one.

How It Changes Over Time

20s
30s
40s
50s+

Smooth at rest; 11s visible only with active frowning.

Lines begin persisting faintly at rest in patients with strong corrugator activity.

Static 11s established; read as tension or disapproval on a relaxed face.

Deepened static creases; skin quality decline compounds apparent depth.

In Your 20s

Lines visible only with active frowning; glabella smooth at rest.

In Your 30s

Lines begin to persist faintly at rest; etching into the dermis starts in patients with strong corrugator activity.

In Your 40s

Static 11s visible at rest; the vertical creases read as tension or disapproval even on a relaxed face.

In Your 50s+

Deepened static creases; collagen loss in the glabella skin compounds the line depth significantly.

Why Patients Treat This Area

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

01

Eliminate the appearance of tension or disapproval on a fully relaxed face

02

Prevent dynamic lines from etching permanently into the dermis

03

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

We Relax The Muscle. We Don't Eliminate The Expression.

Frown line treatment at CAMI involves precise placement in the corrugator and procerus muscles to reduce their contractile force without eliminating all movement. The goal is a glabella that looks smooth and relaxed at rest while still responding naturally to genuine expression.

We assess the depth and pattern of existing lines before treating. Deeply etched static lines may benefit from a small amount of filler in addition to the relaxer — addressing the structural crease that remains even after the muscle is softened.

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CAMI provider administering wrinkle relaxer injection between the brows for frown line treatment

FAQ

Will treating my frown lines affect my ability to express myself?
How long does frown line treatment last?
My 11s are still visible even when my face is relaxed. Can they be fixed?
How do I know if my frown lines need Botox or filler?