This article discusses the evolution and application of PDO volumizing threads in facial lifting procedures. As facial aging leads to decreased skin elasticity and volume, the demand for facial contour enhancement has increased. Volumizing threads are designed to provide volume and shape to the face, with their effectiveness depending on their characteristics, such as elasticity, shape, and functionality. Early versions of volumizing threads were simple PDO monofilaments, but they had limited volume-enhancing effects. Subsequent innovations included threads with curled shapes, which were later modified to maintain their form within tissues. Threads with increased elasticity and rigidity were developed to provide more substantial volume and shape, while others were designed to resist compression and maintain their form. Volumizing threads are classified based on their structure and function. Types include mesh, spring, broom, and braided screw or twisted coil types. Each type has specific advantages and limitations, and their selection depends on the desired outcome and the treatment area. Threads with good elasticity are suitable for sculpting specific areas and restoring facial contours, while softer threads are used for filling deep wrinkles or smoothing skin surfaces. The article also discusses the mechanisms of action of these threads, including their ability to enhance skin elasticity, improve wrinkles, and stimulate collagen production. When used in combination with HA fillers, they can enhance procedural outcomes. However, the selection of threads must consider factors such as thread shape, thickness, firmness, and insertion depth to optimize results and minimize complications. Future research directions include long-term safety assessments and patient-specific outcomes to enhance the clinical utility of volumizing threads. The article provides a comprehensive overview of the development, mechanisms, and classification of PDO volumizing threads, offering practitioners a foundation for informed decision-making in selecting appropriate threads for facial lifting procedures.This article discusses the evolution and application of PDO volumizing threads in facial lifting procedures. As facial aging leads to decreased skin elasticity and volume, the demand for facial contour enhancement has increased. Volumizing threads are designed to provide volume and shape to the face, with their effectiveness depending on their characteristics, such as elasticity, shape, and functionality. Early versions of volumizing threads were simple PDO monofilaments, but they had limited volume-enhancing effects. Subsequent innovations included threads with curled shapes, which were later modified to maintain their form within tissues. Threads with increased elasticity and rigidity were developed to provide more substantial volume and shape, while others were designed to resist compression and maintain their form. Volumizing threads are classified based on their structure and function. Types include mesh, spring, broom, and braided screw or twisted coil types. Each type has specific advantages and limitations, and their selection depends on the desired outcome and the treatment area. Threads with good elasticity are suitable for sculpting specific areas and restoring facial contours, while softer threads are used for filling deep wrinkles or smoothing skin surfaces. The article also discusses the mechanisms of action of these threads, including their ability to enhance skin elasticity, improve wrinkles, and stimulate collagen production. When used in combination with HA fillers, they can enhance procedural outcomes. However, the selection of threads must consider factors such as thread shape, thickness, firmness, and insertion depth to optimize results and minimize complications. Future research directions include long-term safety assessments and patient-specific outcomes to enhance the clinical utility of volumizing threads. The article provides a comprehensive overview of the development, mechanisms, and classification of PDO volumizing threads, offering practitioners a foundation for informed decision-making in selecting appropriate threads for facial lifting procedures.