Nasolabial folds are one of the prominent features of mid-facial aging, an anatomical landmark located on the cheeks at the nasolabial divide that gradually deepens as a person ages. Many people want to know the reasons for the formation of nasolabial folds and how to prevent the formation of nasolabial folds. Nasolabial fold formation reasons: 1, skin aging, thinning, lack of elastic fibers, due to gravity is elongated; 2, the aging of the facial fat layer is significantly faster than the SMAS muscle and bone tissue layer, the increase in the volume of the fat layer will make the aging form enlargement; 3, zygomatic arch ligament, the skin, biting ligament due to lack of elasticity in aging, relaxation, and the effect of gravity is elongated; 4, nasolabial folds outside the upper and lower tissues below the difference: the outer upper laxity, relaxation, and gravity is elongated. The difference between the upper and lower part of the nasolabial folds: the upper part of the outer part is lax and the lower part of the inner part is dense; 5. Repeated expression muscle movements over a long period of time produce shear stresses between the skin, the zygomatic fat pad and the superficial musculotendinous system, and the expression muscles, and the skin and subcutaneous tissues produce downward relative displacements; 6. The maxillary bone is underdeveloped, and the retraction of the upper lip tissues makes the nasolabial folds obvious. In addition changes in body position can lead to changes in the morphology of the nasolabial folds. The degree of nasolabial folds is significantly reduced or disappears in the prone position compared to the sitting position. From the reasons for the formation of nasolabial folds, we can know that the nasolabial folds are actually present from birth, and are the body surface markers that separate the cheeks and the jaws, and we can’t prevent the formation of nasolabial folds, we can only prevent the deepening of nasolabial folds. Attention to maintain facial rejuvenation as well as strengthening exercise and improving immunity are effective ways to prevent the deepening of nasolabial folds. Can try the following methods to prevent the deepening of nasolabial folds: tip of the tongue inside the mouth from left to right up and down, clockwise massage of the inner lip points, more than three times in a row. 1, the tip of the tongue from the upper side of the massage. 2, the tip of the tongue and then converted to the right side of the lips. 3, the tip of the tongue and then switch to the left side of the lips. 4, the tip of the tongue and finally switch to the bottom of the lips.