Both dehydrated and dry skin indicate that the stratum corneum (your outermost layer of skin) doesn’t have enough usable water. The difference is why that happens and how long it lasts.
Dry skin (often clinically referred to as xerosis) is a fixed skin type.
Dehydration is a temporary condition that can occur in all skin types – dry, oily, combination, normal, sensitive.
Let’s break it down.
Your outermost layer of skin relies on two systems:
- Natural Moisturizing Factors
- Intercellular Lipids (ceramides, cholesterol, fatty acids)
When you have a dry skin type, both systems (NMFs and intercellular lipids) are lacking. This depletion of both systems causes an increased rate of water evaporation from your skin known as transepidermal water loss. Something to remember – transepidermal water loss is a very normal part of the skin’s natural function. But transepidermal water loss at a sped up rate causes an issue that translates into dry skin.
Dry skin types are caused by genetics, medical conditions like eczema, and aging. Environmental factors like low humidity and dry climate can worsen this underlying issue, but they’re not the direct cause of a fixed, dry skin type.
Dehydrated skin is a temporary condition that is caused by low water supply. It is not a constant in the way that dry skin types are. Dehydrated skin can be caused by a myriad of circumstantial things such as overusing harsh skincare products, being in a dry climate, insufficient water intake, excessive alcohol consumption and more.
A skin type that is dehydrated and a fixed, dry skin type can appear very similar. They can present as:
- tightness
- discomfort
- dullness
- uneven or rough texture
Dehydrated skin can also cause the production of more acne, as the skin tries to overcompensate for a lack of moisture by producing excess oil.
So, how do you know if you have a dry skin type or if you’re dehydrated?
Overall dehydration can appear in more ways than just among your skin. It can show as increased thirst, fatigue, dark-colored urine, headaches, and more. Prioritizing your intake of water and electrolytes will help to resolve mild dehydration.
While increasing your water intake can help improve systemic dehydration issues, it will not cure a fixed, dry skin type.
Even if the rest of your body is well-hydrated, circumstances such as environmental changes, barrier-disrupting products (such as overusing exfoliants, retinoids, benzoyl peroxide, vitamin C’s), or even frequent, hot showers can cause dehydration to show up on the face.
Additionally, if your skin remains consistently dry despite stable climate conditions, you are adequately hydrated, and partake in minimal use of barrier-disrupting products, you likely are not so much dehydrated but have a true dry skin type.
Skincare products used to manage dehydrated or dry skin often overlap, but there are important differences.
If you have a naturally dry skin type, richer creams and occlusives (such as petrolatum or shea butter) can help to lock in moisture. Exfoliants like lactic and glycolic acid are also incredibly beneficial in drawing hydration to dry skin.
In contrast, if you are dehydrated but have a oily or acne-prone skin type, you will typically benefit from lighter-weight moisturizers and serums that still support hydration and barrier function, without feeling too heavy.
Below are product recommendations for various skin types (dry, normal, combination, or oily) that are suffering from dehydration (tip: if you’re not dehydrated but you’re a fixed, dry skin type – you can still utilize the specific recommendations below within your daily routine).
CLEANSERS FOR SKIN TYPES FACING DEHYDRATION
These cleansers preserve the skin’s moisture barrier by removing impurities without stripping the skin.
- Gentle, Effective Cleansers (recommended for all types):
- Cream-Based Cleanser (recommended for very sensitized skin types):
SERUMS FOR SKIN TYPES FACING DEHYDRATION
These serums, toners, and mists hydrate and prime the skin, enhancing moisture levels before moisturizer and sunscreen.
- Lightweight Hydrating Serums (recommended for combo to oily types):
- Rich Hydrating Serums (recommended for dry to normal types):
MOISTURIZERS FOR SKIN TYPES FACING DEHYDRATION
These moisturizers support the skin barrier by restoring key lipids such as ceramides, attracting water with humectants like glycerin or panthenol, and sealing in moisture to reduce transepidermal water loss.
- Lightweight Barrier Supporting Moisturizers (recommended for combo to oily types):
- Hydrating Barrier Supporting Moisturizers (recommended for normal to dry types):
- Rich Barrier Supporting, Cream Moisturizers (recommended for dry to extra dry skin types):
SPFS FOR SKIN TYPES FACING DEHYDRATION
These sunscreens deliver hydration while shielding the skin from UV exposure, helping prevent barrier disruption.
- Lightweight, Hydrating SPFs (recommended for all skin types – tip: combo and oily skin can skip morning moisturizer and only use SPF)
- Rich, Hydrating SPFs (recommended for extra dry skin types):
- Hydrating, Mineral SPFs (recommended for extra sensitized skin types):
EXTRA SUPPORT FOR FIXED, DRY SKIN TYPES
- Using Vaseline: Applying petroleum jelly to dry spots among the face can help to further seal in water by adding an extra protective barrier to the skin).
- Exfoliating with Lactic Acid: “One of the most notable benefits of using lactic acid is that it helps maintain healthy hydration levels in the skin by normalizing the skin’s natural moisture balance.“
- Exfoliating with Glycolic Acid: Glycolic Acid “enhances epidermal and dermal hyaluronic acid levels for plumper, healthier-looking skin.”
- Product recommendations for dry skin exfoliants:
ADDITIONAL TIPS FOR DEHYDRATED AND/OR DRY SKIN
- Invest in a humidifier to add moisture to a dry climate.
- Try to avoid frequent use of hot water by using lukewarm water to wash your face. Hot water can strip the skin’s natural barrier and exacerbate dryness.
