Compartments · Bone · CityLink Mall
A hollow cheek is rarely one compartment emptying. Bone recedes, deep fat atrophies, superficial fat descends, and each happens on its own timetable — so filling the shadow instead of the loss is how a face becomes heavy and hollow simultaneously.
The midface is built in layers, and the layers do not age together. Bone forms the platform, deep fat sits against it and provides structural projection, superficial fat sits above the SMAS and gives the face its soft contour, and skin covers all of it. Hollowing is the visible result of these four changing at different rates, in different directions, at the same time.
Skeletal change is the least discussed and the most consequential. The maxilla loses height and rotates, the orbital rim widens and recedes, and the pyriform aperture enlarges. A midface once projected forward on a broad platform now sits on a smaller one. This is why a face can lose apparent volume without losing any measurable fat at all, and why soft tissue placed superficially never quite restores the earlier appearance.
The deep fat compartments then atrophy, and they atrophy first. Deep medial cheek fat provides the anterior projection of the midface and supports the nasolabial boundary from behind. The deep lateral compartment supports the cheek laterally. When these deflate, the superficial layer above them has nothing to rest on and settles downward — so the deep loss is expressed as a superficial descent, some distance from where the loss actually occurred.
The superficial compartments themselves mostly change position rather than volume, at least initially. They slide down over fixed boundaries and accumulate below them. This is the origin of the characteristic combination patients describe as losing weight in their face while gaining it in their jaw: the same tissue, lower down. Filling the upper hollow without addressing the lower accumulation deepens the contrast rather than resolving it.
Types
Hollowing is described by its location because location identifies which compartment has changed. The three patterns below look similar under poor lighting and need different volumes placed at different depths in different places.
Volume placed where the shadow is, rather than where the support was lost, is the whole explanation for pillow face.
What Changes
Rate matters as much as extent. Gradual age-related volume loss is expected and is straightforward to plan for. Loss that occurs over months is nearly always driven by something else, and the most common cause presenting now is rapid weight reduction — including medication-assisted weight loss, where facial compartments deflate faster than skin and ligaments can accommodate. That specific pattern is dealt with separately under Ozempic face.
Restoration is planned from the deep layer outward, and the deep layer is usually smaller in volume than patients expect. Structural projection is rebuilt against bone and in the deep compartments where support was lost, using volume restoration chosen for the behaviour required at that depth rather than for brand familiarity. Superficial work follows only if it is still needed after the deep work has settled, and often it is not.
Where descent is contributing, repositioning precedes filling. A midface elevated back toward its original apex needs materially less volume than the same midface assessed flat, and that sequence is the single most reliable protection against an over-filled result. Collagen biostimulation and skin quality work then run alongside, because volume under thin skin reads as a lump and volume under good skin reads as a contour.
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