How skin ages: what changes after 30

Key takeaways

• Facial ageing is not only wrinkles. Skin, fat, ligaments, muscle and bone all change.
• Genetics sets the pace; sun, smoking, weight changes, alcohol and hormones speed it up.
• Ultraviolet light, especially UVA, damages the deeper skin and is the main avoidable cause.
• Lines, hollows and sagging come from different layers, so they need different treatments.
• Understanding which layer is the problem is the first step of any sensible plan.

Why do people age so differently?

Normally, when two school friends meet at 40, one looks 35 and the other looks 48. People assume it is creams or luck. It is mostly two things.

Researchers who study facial ageing describe genetics as probably the most powerful internal factor. That is your intrinsic ageing, and you cannot change it. Then there is extrinsic ageing: the things that happen to your skin from outside. Smoking, unprotected sun, body weight changes, alcohol and hormones are all linked with faster facial ageing. Studies of identical twins, who share the same genes, have shown that the twin with more sun exposure looks older.

So you cannot pick your genes, but a good part of the difference is in your hands.

What happens to the skin itself?

The skin has an outer layer you can see and a deeper layer, the dermis, which gives it strength and spring.

• Collagen is the scaffolding of the dermis. With age, the body makes less of it and breaks down more.
• Elastin is what lets skin snap back. A 2022 review notes that elastin production begins to decline sharply by the age of 40 to 50.
• Sun damage adds to this. UVA light reaches the dermis and damages it mainly through reactive oxygen species. Over years, sun-damaged skin collects abnormal, clumped elastin material, a change called solar elastosis, and its collagen-making cells work less well.
• Pigment changes too. Some areas lose pigment cells while others form sun spots.

This is the layer that shows fine lines, rough texture, dullness and uneven tone. It is also the layer that sunscreen protects. More on that in sun damage and ageing.

What happens underneath the skin?

See, what happens is, most people think a sagging face is just loose skin. The skin is only the top of the story.

Fat pads. The face has separate pockets of fat. With age, the deep ones tend to shrink while some of the surface ones shift downward. That is why cheeks flatten, the area under the eyes hollows, and fullness gathers near the jaw.

Ligaments. Small ligaments tether the skin and fat to the bone. As they weaken, the tissues they hold drift down. Researchers describe the weakened supports acting like a hammock for the shrunken tissue above.

Muscles. Facial muscles change in tone and movement with age. Repeated movement folds the skin above them, which is where expression lines come from.

Bone. This surprises people the most. The skeleton of the face remodels over life. The eye socket gradually widens, the upper jaw can move backwards, which flattens the cheek, and the shape of the lower jaw changes. A 2022 review notes that this mid-face change may begin after 30. When the foundation shrinks, everything on top of it has less support.

Which layer causes which change?

This is a simplification, and most faces have a bit of everything. But it explains why a person who fills every line ends up looking puffy, and why a person who only uses creams wonders why their cheeks still look tired.

What does this mean in your 30s, 40s and 50s?

In your 30s, the main changes are usually in the skin itself and in expression lines. Protection and a good routine do most of the work. Some people start to see early hollowing under the eyes.

In your 40s, volume loss and early laxity tend to join in, and the elastin decline becomes visible. This is the decade where planning matters most, because it is easy to overdo things.

In your 50s and beyond, bone and fat changes are more obvious, skin is thinner, and for women, hormonal changes around menopause add to it. Non-surgical treatments can help a lot, but they have honest limits.

Can you slow it down?

You cannot stop intrinsic ageing. You can slow the extrinsic part:

• Wear broad-spectrum sunscreen every day, including indoors near windows, because UVA passes through glass.
• Do not smoke.
• Keep your weight steady where you can. Body weight is one of the outside factors researchers link with how old a face looks.
• Sleep and manage stress, which help skin repair.
• Use a basic, consistent routine rather than many products.

That is very important to understand: none of these are dramatic. They work slowly, over years, which is exactly how ageing works too.

How we approach this at Dr Tvacha

At our centres in Thane, Andheri, Bandra and Dahisar, our face assessment looks at each layer separately: skin quality, lines, volume and laxity. Then we decide which layer matters most to you and where you want to be in five years. Only after that do we talk about treatment, and sometimes the plan is simply protection. You can read about the Long Game Anti-ageing Plan, or about when to start.

Written by

Dr Amit KarkhanisAesthetic Physician · MBBS, Dip. Dermatology (UK) · Reg. No. 2001/02/1124

Founder of Dr Tvacha, practising in Thane since 2005. Leads the weight loss and hair programmes.