Deep nasolabial folds
Nasolabial sulcus is a body surface mark of a person's face. Everyone will have it. The depth varies according to individual differences. It will gradually deepen with age. Generally, it will begin to deepen at 25 years old. The organization was sagging and gradually aggravated. Nasolabial sulcus is a shallow sulcus on both sides of the nose to the outside of the corner of the mouth. This ditch is obvious only in children and young people when they smile, and it is also obvious in facial aging.
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