Facial asymmetry, particularly affecting the curvature of the lips during smiling, is a condition where one side of the mouth turns up more than the other. This difference in muscle activity can result from various factors, leading to what is commonly perceived as an uneven or imbalanced expression. An example includes a smile where the left corner of the mouth elevates significantly more than the right, creating a visibly tilted appearance.
Addressing this condition can improve self-confidence and contribute to a more balanced facial aesthetic. Historically, attempts to correct such asymmetry have ranged from facial exercises and massage to more invasive surgical interventions. The perceived importance of a symmetrical smile often stems from its association with attractiveness and approachability in social interactions.
