Marionette lines are vertical wrinkles that run from the corners of the mouth toward the chin. The key causes are the descent of fat and skin in the cheek area, which folds at the mouth corner, a reduction in volume around the mouth corner due to loss of bone or fat, and decreased skin elasticity around the mouth corner.
In addition, the ligament structure around the mouth corner is relatively firmly fixed, so sagging tissue catches on this boundary line and deepens like a valley—this is the typical formation process of marionette lines. Facial expression habits, rapid weight changes, and UV exposure can also affect the rate of progression.
In other words, marionette lines are not caused by a single factor but are a complex wrinkle resulting from a combination of volume loss, tissue sagging, and collagen reduction in the skin itself. Therefore, diagnosing which factor is dominant is the starting point for selecting a treatment.





