Nasolabial folds meaning: smile lines and photo limits

VerdictEstablished

Nasolabial folds are the lines that run from the sides of the nose to the corners of the mouth. Everyone has them when smiling. They deepen at rest as cheek fat moves down with age.

These folds are an established feature in the skin area. A selfie can measure their visible depth at rest, but the result describes that photograph. It doesn't turn a number into a fixed fact about your face. Start by checking whether your face is relaxed in the image.

Updated 12 November 2026

Nasolabial folds meaning: smile lines and photo limits

At a glance

Term
Nasolabial folds
Area
Skin
Measurable from a selfie
Yes: the depth of the fold at rest
Evidence
Established
Related
Photoaging, Collagen, Facial fat loss

Smiling and resting show different appearances

A fold visible during a smile doesn't answer how deep it looks at rest. Keep those observations separate when you assess the lines beside your mouth.

For example, a smiling photo and a relaxed photo answer different questions. Comparing their scores as though they show the same condition can mislead you. If you want to assess resting folds, use a relaxed expression for each comparison.

A selfie can estimate resting fold depth

Yes, nasolabial fold depth at rest is measurable from a selfie. Read this as an estimate of visible depth, rather than an exact physical measurement beneath the skin.

The common mistake is treating a number from a photo as permanent. Keep your expression, lighting and camera angle consistent when comparing images. A different photographic setup makes it harder to tell whether the fold's appearance has changed.

The evidence status is established

Evidence: established. The nose-to-mouth folds are a defined facial feature. That status applies to the feature itself; it doesn't prove that every photo score measures it accurately.

As cheek fat moves down with age, the folds deepen at rest. Facial fat loss, collagen and photoaging are related topics, rather than interchangeable names for these lines. Use the glossary to check each term before treating a label as an explanation.

Check what a scan actually reports

The free face scan reports skin and structure signals from a photo, with the limits of a single photo stated. Skin signals include acne, pores, redness, oiliness and dark circles.

Don't assume a general structure signal is a direct measurement of your resting smile lines. Read the named output before drawing that conclusion. A report should tell you what it assessed; its score alone can't explain why a fold looks deeper.

Questions people ask

Are nasolabial folds the lines beside my nose?
Yes, if you mean the lines running from the sides of your nose to the corners of your mouth.
Does everyone have nasolabial folds when smiling?
Yes. Seeing them during a smile doesn't tell you how deep they appear when your face rests.
Can a selfie score explain why my folds look deeper?
A score alone can't explain the cause. It describes an assessment of that image, so check your expression and photo conditions before interpreting a difference.

Written from the measurements and ingredient facts on this site, then checked for the usual mistakes. Not medical advice.

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