Understanding Your Skin Type and Why It Changes

Most people identify their skin type once — usually in their teens or early twenties — and carry that label with them for the rest of their skincare life. Oily, dry, combination, sensitive. A box is ticked, products are selected accordingly, and that categorisation rarely gets revisited.

The problem is that skin type is not fixed. It changes with age, with seasons, with hormones, with health, with diet, and — crucially — with how you are treating it. Many people who believe they have oily skin have dehydrated skin that is overcompensating. Many who believe they have sensitive skin have a compromised barrier that can be repaired. Using the wrong products for what your skin actually is right now, rather than what you decided it was a decade ago, is one of the most common sources of skincare frustration.

At REGEN Clinic, skin assessment is the starting point of everything we do. This guide explains what skin type actually describes, how it changes, and why understanding it correctly changes what your skincare should look like.

What Skin Type Describes

Skin type refers broadly to the inherent characteristics of your skin determined by genetics and sebaceous activity — how much oil your skin produces, how it responds to its environment, and its baseline level of sensitivity or resilience. The four common categories are oily, dry, combination, and normal, with sensitive described more as a characteristic that overlaps with any of these.

This classification is useful as a starting point, but it is far less precise than most skincare products imply. The real clinical picture is more nuanced.

Oily Skin

Oily skin produces excess sebum — the skin's natural oil — resulting in a consistently shiny appearance, larger pores, and a greater tendency to breakouts and congestion. The underlying driver is often genetic, but hormonal changes, diet, climate, and — importantly — skincare choices can all amplify or reduce sebaceous activity.

One of the most common drivers of apparent oily skin in adults is a damaged or depleted barrier caused by over-cleansing, over-exfoliating, or using products that strip the skin. When the skin's barrier is compromised, it loses water and, in response, increases sebum production to compensate. This is sebum as a protective mechanism, not as a skin type. Treating it with more aggressive cleansing or oil-stripping products makes it worse, not better.

Dry Skin

Dry skin produces less sebum and is more prone to tightness, flaking, and the appearance of fine lines — particularly after cleansing. It is distinct from dehydration, which is a lack of water in the skin rather than a lack of oil. A skin can be both dry (low oil) and dehydrated (low water) simultaneously — in which case it needs both barrier support and hydration.

Dry skin is often more reactive to actives and benefits from a more conservative introduction of exfoliants and retinoids. The barrier, by definition, is more fragile and requires more deliberate support.

Combination Skin

Combination skin presents with an oily T-zone — forehead, nose, and chin — and drier cheek zones. It is the most common skin type and the one that most accurately describes the condition of most adult skin. It requires a degree of zonally aware product application that single-product routines do not easily accommodate.

Sensitive Skin

Sensitivity describes the skin's reactivity — how readily it responds with redness, stinging, itching, or breakout to products or environmental factors. True constitutional sensitivity is less common than acquired sensitivity. Most clients who describe their skin as sensitive have developed that sensitivity through barrier compromise — often as a result of aggressive products, over-exfoliation, or inappropriate treatment.

The distinction matters because constitutional sensitivity is managed by avoidance of triggers; acquired sensitivity from barrier compromise is managed by barrier repair, which is an active process that has a predictable recovery arc.

How Skin Type Changes

With Age

The sebaceous glands reduce activity with age. Skin that was genuinely oily in the twenties often becomes drier through the thirties and forties, with the T-zone less pronounced. Collagen and elastin production decline, reducing the structural support that keeps the skin plump and firm. Cellular turnover slows, affecting texture and radiance.

A skincare routine that was appropriate at 28 may be actively drying or insufficient at 42. This is one of the most common mismatches we see in clinic: a client using products suited to a younger, oilier skin type on a skin that has shifted toward dryness and barrier sensitivity.

With Hormones

The menstrual cycle, pregnancy, perimenopause, and menopause all produce significant changes in skin character. Oestrogen supports collagen production, skin thickness, and moisture retention. As oestrogen declines in the perimenopause, the skin often becomes drier, thinner, and more reactive — sometimes quite quickly. Breakouts that appear for the first time in the mid-forties are frequently hormonal in origin, driven by the relative androgen dominance that accompanies falling oestrogen levels.

With Seasons

Most people's skin behaves differently in winter than in summer — lower humidity draws more water out of the skin, reducing barrier function and increasing sensitivity. A lighter summer moisturiser is often insufficient in winter, and routines that do not adapt seasonally frequently produce problems in the colder months.

With Your Skincare

This is the most immediately actionable variable. Products that are too harsh for your current barrier function will compromise the barrier further, producing the oiliness, sensitivity, and reactivity that look like inherent skin problems but are product-induced. A systematic review of what you are using — its strength, its frequency, its interaction with the other products in the routine — often reveals the source of problems that seem inexplicable.

Building a Routine Appropriate to Your Skin Now

At REGEN Clinic, we assess skin before we prescribe for it. The combination of a clinical history, a skincare review, and a skin analysis with dedicated equipment allows Dr Chris to see what the skin actually is — not what the client believes it to be — and to build a regime accordingly.

This assessment is especially valuable for clients at hormonal transition points, for those who have experienced significant changes in their skin in the past year, and for those who have been using a routine for some time without the results they expected.

Book a skincare consultation at theregenclinic.com to understand your skin properly and receive a regime built for where it is now.