Submental Definition
The Neck & Jawline Junction
Anatomy
The submental region is the area beneath the chin where the jaw meets the neck. Definition here refers to the clarity of the submental cervical angle formed between the neck and the underside of the chin.
Why It Matters
Submental definition creates the clean jaw-to-neck transition that defines a youthful, attractive profile. A sharp submental region is one of the most sought-after features, as it creates the appearance of a sculpted, defined jawline even when viewed from unflattering angles. Research has established specific ideal ranges for the cervicomental (chin-to-neck) angle across different ethnicities and genders (Naini & Gill, 2008).
What Affects Definition
depends on fat distribution, skin elasticity, hyoid bone position, and muscle tone. This is one of the first areas to show aging and weight gain.
- 01Submental fat = fat pad beneath the chin
- 02Skin laxity = loose skin obscures definition
- 03Hyoid position = bone position affects angle
- 04Platysma tone = neck muscle tightness
How to Assess
Key indicators when evaluating submental definition.
- Assess submental contour sharpness under the chin
- Look for depth and shadow contrast in this region
- Note how crisp the shadows appear under the chin
- Check for double chin and loose skin
- 01Head extension artificially improves the appearance
- 02Lighting from above hides submental softness
- 03Don't assess neck width or size — focus on definition only
Compare Levels
Tap each level to see how submental definition varies across the spectrum.
Moderate definition with a visible but gentle angle. Acceptable jaw-neck transition.
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