“My skin feels tight, dull and uncomfortable, but it's not usually particularly dry. » Many people make this observation without understanding why. Confusion is common between dry skin and dehydrated skin: two different problems, which are not treated in the same way, and which can nevertheless coexist on the same face.
Dry skin: a skin type, a lack of lipids
Dry skin is a type of skin, just like oily or combination skin: it is permanent and generally genetically determined. It is characterized by insufficient production of sebum, which weakens the protective hydrolipidic film. Dry skin is often thin, with barely visible pores, prone to tightness, scales and a feeling of roughness to the touch, particularly in winter.
Dehydrated skin: a condition, a lack of water
Skin dehydration is a temporary condition that can affect absolutely all skin types, including oily or combination skin. It reflects a lack of water in the superficial layers of the epidermis, often linked to external factors (climate, heating) or to a weakened skin barrier which allows water to evaporate faster than it is retained. Dehydrated skin feels tight, appears dull and tired, shows expression lines more easily, and can even, paradoxically, produce more sebum to compensate.
How to tell if your skin is dry or dehydrated
A simple test can tell the difference: gently pinch the skin of your cheek between two fingers. If small fine lines appear and persist for a few seconds before disappearing, this is a sign of dehydration. Dry skin tends to have a rough texture and areas of peeling that are permanently visible, regardless of this test. Another clue: dehydrated skin can shine in places (T zone) while feeling tight elsewhere, which never happens with classic dry skin.
The causes of skin dehydration
Many everyday factors dry out the skin on the surface: heating and air conditioning which lower the humidity of the air, hard water, showers that are too hot and prolonged, cleaning that is too aggressive or too frequent, the use of exfoliating or drying active ingredients without adequate hydration at the same time, lack of sleep, stress, insufficient internal hydration, as well as alcohol and tobacco.
The routine adapted to each case
For dry skin, the objective is to nourish sustainably: favor textures rich in lipid agents (vegetable oils, butters, ceramides) which strengthen the hydrolipidic film over the long term. For dehydrated skin, the objective is to provide water and retain it: humectant active ingredients such as hyaluronic acid or glycerin capture water, while a lighter but occlusive texture (containing for example squalane) prevents its evaporation. In both cases, gentle cleansing and daily sun protection are essential to avoid aggravating the problem.
Can you have oily AND dehydrated skin?
Yes, and it is even a very common situation. Oily skin can lack water while producing excess sebum: deprived of hydration, it compensates by secreting more sebum, which creates an uncomfortable circle of shine and simultaneous tightness. The solution is never to further dry out dehydrated oily skin, but on the contrary to provide it with light, non-comedogenic hydration rich in humectants.
In summary
Dry skin and dehydrated skin look similar on the surface but respond to different logics: one lacks lipids in the long term, the other lacks water occasionally. Identifying which one concerns you - or if the two combine - is the key to choosing the right active ingredients and regaining comfortable and balanced skin.
