What ‘jowl filler’ actually treats
Filler is rarely placed into the jowl itself. The clinical target is the pre-jowl sulcus — the small indentation in front of the jowl, just before the chin — and the mandibular border behind it. By rebuilding structural support on either side of the jowl, the shadow of the jowl is reduced and the jaw appears continuous again.
This distinction matters: injecting volume directly into a heavy jowl tends to enlarge it. Skilled lower-face contouring restores the jaw line that frames the jowl, which is what the eye actually reads as ‘tighter’.