It can sometimes be challenging to distinguish between a dull complexion and a dehydrated one. These two issues, although distinct, can occur simultaneously and are often confused. However, differentiating between dull skin and dehydrated skin is the first step towards regaining a hydrated and radiant complexion. Here are some identification keys to follow.
Dull or dehydrated skin: how to tell the difference?
Summary
Published on January 22, 2025, by Pauline, Chemical Engineer — 6 min of reading
Themes:
What does it mean to have dull skin?
The term "dull complexion" refers to skin that lacks radiance and appears tired or grey. This phenomenon is primarily linked to a slowdown in cell renewal. On average, this natural process, which allows for the removal of dead cells from the skin's surface, takes place over 28 days. However, due to factors such as ageing, stress, poor diet, or external aggressors like pollution or smoking, this cycle can lengthen. As a result, dead cells accumulate, forming a veil on the skin's surface, which no longer reflects light properly. A dull complexion is often accompanied by an uneven or rough skin texture, particularly in areas where the skin is thicker, such as the forehead or chin.
Dull skin suffers from an imbalance in its regeneration rhythm, which impairs its ability to reflect light.
Advice : A skincare routine that includes antioxidants and regular exfoliation can help the skin regain its radiance.
What is dehydrated skin?
Skin dehydration is a skin condition, that is, a temporary state characterised by a lack of water in the stratum corneum, the outermost layer of the epidermis. Unlike dry skin, which is a skin type associated with a lipid deficiency, dehydration can affect all skin types, including oily skin. The main signs of dehydration are discomfort, such as tightness or tingling, especially after cleansing the skin. Visually, dehydration fine lines may appear on areas such as the cheeks or around the eyes, giving the skin a wrinkled or tired appearance.
A dehydrated skin is characterised by a lack of water, which intensifies feelings of discomfort and makes it more vulnerable to external aggressions.
Advice : A skincare routine rich in humectants can enable the skin to restore its hydration levels.
How to differentiate between dull skin and dehydrated skin?
Distinguishing between dull skin and dehydrated skin can sometimes be challenging. However, several elements can guide you, starting with the overall appearance of the skin. A yellowish to greyish colour betrays an accumulation of dead cells and is characteristic of a dull complexion. Dehydrated skin, on the other hand, displays more localised signs, such as fine lines, particularly around the eyes, indicating a lack of water in the epidermis.
The second aspect to examine in order to distinguish between dull skin and dehydrated skin is the sensations. While a dull complexion may feel slightly rough to the touch, it remains comfortable and does not feel tight. Conversely, dehydrated skin often results in feelings of tightness, especially after a shower or a day spent in a dry environment, such as an air-conditioned office. This difference can be explained by the condition of the skin barrier: when it is weakened, the skin struggles to retain water, which leads to these feelings of discomfort.
The pinch test can also help you gain a clearer understanding. By gently pinching the skin on your cheek or the back of your hand, observe its reaction: if it remains creased for a few moments before returning to its original shape, this is a sign of dehydration. Dull skin, on the other hand, regains its appearance quickly, unless it is also dehydrated.
| Criteria | Dull Skin | Dehydrated Skin |
|---|---|---|
| Appearance | Greyish, yellowish complexion, lack of overall radiance | Presence of superficial fine lines, particularly around the eye contour |
| Sensations | Comfortable, despite a sometimes rough touch | Tightness, especially after a shower or in a dry environment |
| Pinch Test | Quickly regains its original shape | Takes time to regain its initial form |
| Cause | Accumulation of dead cells on the skin surface | Lack of water in the superficial layers of the skin |
Summary of the differences between dull skin and dehydrated skin.
Sources
BONTÉ F. & et al. Skin Hydration: A Review on its Molecular Mechanisms. Journal of Cosmetic Dermatology (2007).
FOWLER J. Understanding the Role of Natural Moisturising Factor in Skin Hydration. Practical Dermatology (2012).
ROBIC G. & et al. Yellowness in skin complexion: Analysis of self-perception of women in China evaluated against clinical parameters of yellowness. Skin Research and Technology (2024).
