The likelihood of facial widening (i.e., a broader facial appearance due to volumetric increase) following scar filler treatment is directly related to the injection technique, the targeted anatomical plane, and the volume of product used.

 

In superficial dermal applications performed with needle-based microinjection techniques—particularly in the treatment of atrophic scars—hyaluronic acid is delivered in very small volumes and confined to limited areas. The primary aim of this approach is to elevate the scar tissue and provide structural support at the dermal level, rather than to increase overall facial volume. Therefore, when performed with appropriate technique in the superficial dermis, scar filler treatment is not expected to result in facial widening.

 

In contrast, when hyaluronic acid or fat is injected using a cannula in deeper planes—particularly at the level of the subcutaneous fat—and in higher volumes, a regional increase in volume may occur. Such cannula-based applications can result in a wider or fuller facial contour.

 

In conclusion, whether facial widening occurs after scar filler treatment depends mainly on the anatomical plane of injection, the technique employed, and the volume of material injected. When performed with proper indication and correct superficial dermal technique, there is no risk of facial widening.