> For the complete documentation index, see [llms.txt](https://docs.saas.haut.ai/haut.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.saas.haut.ai/haut.ai/haut.ai-features/algorithms/face-skin-analysis-3-0/lines/nasolabial-wrinkles.md).

# Nasolabial Wrinkles

What the Nasolabial Wrinkles parameter measures between the nose and the corners of the mouth, and how to read the grades it returns.

## About Parameter

This parameter assesses the visibility and severity of nasolabial wrinkles (also known as smile lines or laugh lines), which are creases that run from the sides of the nose to the corners of the mouth. These wrinkles become more prominent with age due to decreased skin elasticity and natural volume loss, along with the downward shift of facial tissues.

## Features

1. Works with 1 and 3 side facial images.

## Output

1. Grade from 1 to 5
2. Algorithm-assigned skin condition tag (Great, Good, Average, Poor).
3. Vector mask for detected features.

## Grades Description

<table><thead><tr><th width="120.4296875">Grade value</th><th width="490.90234375">Description</th><th>Tags</th></tr></thead><tbody><tr><td>1</td><td>No visible folds or wrinkles. The skin appears smooth and even.</td><td>Great</td></tr><tr><td>2</td><td>Subtle fullness in the cheek appears, extending from the nasal wing and creating a gentle shadow.</td><td>Good</td></tr><tr><td>3</td><td>A prominent cheek volume creates an elongated roll from the nasal wing toward the lips. No deep creases are present, though fine lines may appear.</td><td>Average</td></tr><tr><td>4</td><td>The cheek volume forms a defined fold with a noticeable crease or deep wrinkle at its base.</td><td>Poor</td></tr><tr><td>5</td><td>A deep fold appears with a prominent wrinkle at its base. The fold's contour is sharp and well-defined.</td><td>Poor</td></tr></tbody></table>

## Algorithm API

{% hint style="warning" %}
API access is available only for <mark style="color:purple;">**Professional**</mark> plan clients
{% endhint %}

See [Nasolabial Wrinkles Parameter Result Scheme](/haut.ai/developers/saas-api-overview/api-for-face-skin-analysis-3.0/lines/nasolabial-wrinkles.md).

***

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