
A smile line, unlike the name suggests is not something that puts a smile on the face. It is a fold that forms around the mouth because of aging, i.e., it represents the age line. Technically known as the nasolabial fold, it runs from the corner of the nose and curves around the corner of the mouth. With age, the fold becomes more visible because of the depth it gains and the shadow it casts. No wonder, many people want to get rid of them by any means as they make the person look much older and tired.
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