In evaluating your concerns regarding the submental area, the treatment approach should be tailored based on the underlying anatomy and tissue characteristics. If there is localized fat accumulation under the chin, submental liposuction can effectively improve definition and enhance the jawline contour. However, in cases where fat volume is minimal and the primary issue is skin laxity or muscle banding, liposuction alone may not be sufficient to achieve the desired refinement. In such situations, a neck lift becomes a more appropriate option, as it directly addresses skin redundancy and platysmal muscle separation, resulting in a more defined and structured neck–jawline transition. In selected patients, if chin projection is also lacking, combining these procedures with chin augmentation can further optimize facial balance and profile harmony. The most appropriate treatment plan should be determined after a detailed clinical assessment of skin quality, fat distribution, and underlying neck anatomy to ensure a natural and long-lasting outcome.