The nasolabial folds are the surface markers that separate the cheeks and jaws, and are secondary to the excess skin folds that are often referred to as the two sides of the “triangle of facial danger”. It is formed as a result of the interaction between the dynamic and non-dynamic tissues of the cheek. The nasolabial folds play a vital role in facial expressions. Many of people’s expressive actions, such as smiling and crying, are initiated by a change in the shape of the nasolabial folds. For example, smiling begins with the muscles around the nasolabial fold, and when they contract, the upper lip is pulled backward toward the nasolabial fold, and due to the thick subcutaneous fat in the cheek, the lip encounters resistance at the nasolabial fold, causing it to curve and deepen. Similarly, expressions and movements such as crying, showing teeth, and chewing are accompanied by the curvature and deepening of the nasolabial fold. The nasolabial folds are present from birth and remain with the person throughout his or her life. The nasolabial folds also go through a process of changing from shallow to deep, from narrow to wide, and from short to long. In adolescence, facial expressions and resting state, changes in the shape of nasolabial folds and their original state give a natural and harmonious appearance. When the age of the face exceeds 30 years, aging changes gradually appear, especially the deepening of the nasolabial folds is most obvious, because the sagging of facial skin accumulates on the buccal side of the nasolabial folds, plus the frequent activities of the nasolabial folds for more than 30 years, so the nasolabial folds gradually deepen, widen and elongate in the resting state. The above-mentioned manifestations are more obvious under various facial expressions. The nasolabial folds are divided into three degrees according to the degree of obviousness: 1. mild No obvious creases and nasolabial ridges are visible at rest, and slight creases are visible when smiling. 2. 2.Moderate The nasolabial fold and the nasolabial ridge are obvious in the static state, but the nasolabial ridge does not exceed the nasolabial fold; 3.Severe The deeper nasolabial fold is visible in the static state, and how to remove nasolabial ridge exceeds the nasolabial fold downward. The deepening of nasolabial folds is a sign of aging, which often brings troubles to people who love beauty. Various kinds of cosmetic nasolabial folds have been created in response to the demand. Such as wrinkle reduction, filler and laser for the face. In terms of effect, the combination of wrinkle reduction and filler can make the nasolabial folds lighter and smoother.