Understanding facial volume loss.

When most people think about facial ageing, they think about lines on the skin. The skin certainly does change — it thins, dries, loses elasticity, gathers fine lines. But the more interesting story is happening underneath. The structure of the face is changing, and the skin is responding to that change.

The face has layers

A useful way to think about the face is in layers. From deepest to most superficial:

1. Bone. The bony skeleton of the face, particularly around the eye sockets, the jaw and the mid-face.
2. Deep fat pads. Discrete pockets of fat that sit on the bone, giving the face its underlying shape.
3. Muscles of facial expression. The thin sheet-like muscles that pull on skin to create expression.
4. Superficial fat pads. Pockets of fat just below the skin that provide softness and contour.
5. Skin. The dermis, with its collagen and elastin scaffolding, and the epidermis above it.

All of these change with age, at different rates and in different directions. Understanding which layer is changing helps explain what people see in the mirror and what each kind of treatment is and isn't for.

Bone resorbs

From around the fourth decade onwards, the bones of the facial skeleton slowly lose mass. The eye sockets enlarge, the jaw line shortens, the mid-face flattens. These are small changes, but they have outsized effects because the soft tissues above them lose their underlying support. Cheeks descend. The lower lid hollows. The chin retreats.

No injectable replaces bone, of course. But some injectable treatments are designed to mimic the structural support that bone provides — placed deep, against the bone, to restore some of the lost support.

Fat redistributes

Facial fat is not a single thing — it is a collection of discrete pads with specific anatomy. Some pads shrink with age, particularly in the cheeks and temples. Others enlarge or descend, particularly under the eyes and along the jawline.

This redistribution explains a lot. It explains why faces can look both hollowed and heavier with age. It explains why filling one area in isolation rarely produces a natural result — the change has happened in multiple pads at once, and the proportions matter.

Muscles change too

Repeated muscle activity over decades creates the dynamic lines we associate with expression — frown lines, crow's feet, forehead lines. These are not pure skin changes; they reflect muscle activity. This is why interventions that act on the muscle layer affect these specific lines but do nothing for lines that are not muscle-driven.

Other muscles weaken with age, which contributes to the descent of certain features. A lift — whether by threads or by surgery — addresses this layer.

Skin tells the story last

By the time we notice surface changes — loss of glow, fine lines, uneven texture — the deeper layers have usually been changing for some years. Superficial skin-focused interventions and topical care can support skin quality at this layer. They do not change the structural picture below.

What this means for choosing treatment

The reason a careful consultation matters is precisely because the layers are different. The cosmetic question is rarely about which procedure — it is more often "what is actually changing under here, and which layer (if any) would I want to address?"

For example:

• If the concern is frown lines that appear with expression, the muscle layer is the relevant one.
• If the concern is loss of cheek definition or temple hollowness, the fat-pad and (indirectly) bone layers are relevant.
• If the concern is loose skin along the jawline, the laxity is at the skin and supporting-connective-tissue layer.
• If the concern is skin quality — tone, fine texture, dryness — the skin itself is the layer.

Each of these calls for different things, in different proportions. None calls for everything at once. The art of cosmetic medicine is not in the volume of product used — it is in the careful assessment of which layer needs what, and how much.

And sometimes the answer is to do less

A face that has been over-filled in one layer to compensate for changes in another rarely looks right. The most honest answer at a consultation is often to do less than the patient came in for — or to address skin quality and lifestyle factors first and revisit injectable options later, or never. That is not a sales answer. It is the considered one.