Nasolabial Angle
The nasolabial angle is the angle between the columella of the nose and the upper lip — a key marker of nose tip rotation.
Definition
The nasolabial angle is formed at the junction between the columella (the central pillar of the nose between the nostrils) and the upper lip. It is measured in profile view as the angle between a line tangent to the columella and a line tangent to the upper lip. The angle reflects how much the nose tip is rotated upward (cephalically). A more obtuse angle indicates an upturned, rotated tip. A more acute angle indicates a downturned, ptotic tip. Sex-specific norms differ: ideal range for men is approximately 90-100°, for women 95-110°. Outside these ranges, the nose appears either over-rotated (piggy) or under-rotated (drooping). The angle is one of the primary metrics rhinoplasty surgeons aim to optimize.
Why it matters
Tip rotation is one of the most visually impactful nose proportions because it determines whether the nose reads as elegant, masculine, soft, or droopy. Subtle changes (5°) can transform overall facial impression. The angle also interacts with profile attractiveness — over-rotated tips on long midfaces look exaggerated, while under-rotated tips on short midfaces produce a heavy bottom-third. Rhinoplasty consultations always include nasolabial angle measurement for this reason.
How AI measures it
AI measures the angle from a true side-profile photo by detecting the columella tangent line and upper lip tangent line at the subnasale point. The angle between them is reported in degrees. Slight head tilt biases the result, so AI tools correct for pose using facial midline alignment.
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Frequently asked questions
What is an ideal nasolabial angle?
90-100° for men, 95-110° for women. Outside these ranges the tip looks either over-rotated or droopy.
Can you change your nasolabial angle without surgery?
Filler can adjust the angle modestly — tip-support filler can rotate the nose upward 3-5°. Surgical rhinoplasty (tip rotation, columellar strut grafts) gives precise, permanent control.
Does the nasolabial angle change with age?
Yes — the nose tip slowly drops over decades due to cartilage and ligament laxity, decreasing the nasolabial angle and producing the "lengthening nose" of aging.