Journal / Understanding skin
Dry or dehydrated skin? Understanding the difference.
The two words are often used as if they meant the same thing. In skincare they describe different situations, and they can occur together.
The short answer
Dry skin is generally described as a skin type that produces less oil and tends to be flaky, itchy or rough. Dehydrated skin is described as a temporary condition in which skin lacks water and looks dull. The terms are descriptive, not diagnoses, and one person can have both. Dryness that does not improve should be seen by a dermatologist.
01 / Two terms
What each word is used to mean.
In skincare writing, “dry” and “dehydrated” are separated like this. Dry skin lacks natural oils and is considered a skin type. Dehydrated skin lacks water and is considered a condition, something that comes and goes.[1]
A skin type is your skin’s general tendency. It can shift with age and season, but it is fairly stable. A condition is a state your skin is in for a while. The distinction is explained further in skin type vs skin condition.
Two cautions apply. These are descriptive terms, not medical diagnoses, and people use them loosely. And they are not exclusive: skin of any type can be short of water, including oily skin.
02 / How each tends to look
Telling them apart.
- Dry skin
- The American Academy of Dermatology describes dry skin as flaky, itchy or rough.[4] It tends to feel this way most of the time and to worsen in cold or dry weather.
- Dehydrated skin
- Described as dull, sometimes itchy, with fine lines that look more noticeable than usual.[1] It tends to vary from week to week.
- Both together
- Possible, and common in winter. Skin that is dry by type can also become dehydrated.
- Oily and dehydrated
- Also possible. Shine and discomfort can appear on the same face; see oily but dehydrated skin and why skin can look shiny but still feel uncomfortable.
You do not need to settle on a single label. What matters is what you observe: how the skin feels, whether that is constant or changeable, and what seems to make it better or worse. Fine lines that come and go have their own explanation in dehydration lines vs wrinkles.
03 / What each needs
Why the difference matters when you choose products.
The practical value of the distinction is in the moisturiser. A moisturiser works by putting moisture into the skin and by preventing water from leaving it.[3]
- If your skin is dry by type
- The AAD’s guidance is to choose an ointment or cream over a lotion, because they add more moisture and are more effective.[2] A dermatologist quoted by the AAD suggests that people whose skin tends to be dry start with a cream or ointment.[3]
- If your skin seems short of water
- Apply moisturiser to damp skin, which traps water in the skin.[4] Ingredients such as glycerin and hyaluronic acid appear on the AAD’s list of ingredients to look for in products for dry skin.[2] See hyaluronic acid and glycerin.
- If it is both
- A cream applied to damp skin after washing addresses both at once.
The related terms are untangled in hydration vs moisturisation. For texture, see cream, lotion or gel moisturiser; for one frequently recommended ingredient, see ceramides in skincare. Whether dry areas need their own product is covered in do you need an eye cream or a separate neck cream.
04 / Everyday causes
Habits that make dryness worse.
Much of what dries skin has little to do with products. The AAD’s tips for relieving dry skin begin with habits.[2]
- Long, hot showers. Limit baths and showers to five to ten minutes and use warm water.
- Heavy lather. Use a gentle cleanser and only as much as you need.
- Rubbing dry. Pat the skin with a towel.
- Leaving skin bare after washing. Apply moisturiser while the skin is still damp.
- Fragrance and alcohol. The AAD advises stopping products that contain alcohol or fragrance, and retinoids, if your skin is dry.
- Dry indoor air. A humidifier can add moisture to the air.
Cold weather and indoor heating reduce humidity and make it harder for skin to hold moisture.[5] See cold weather and indoor heating, flying and skin dryness and, more broadly, should your skincare routine change with the seasons.
05 / A common question
Does drinking water help?
It is often said that dehydrated skin is treated from the inside. Healthline’s overview describes drinking enough water and other lifestyle changes as the first steps for dehydrated skin, and states that drinking more water does not fix dry skin, although it remains good for general health.[1]
That is a useful summary of where the two terms part ways. It is also a reason for modest expectations: extra water does not replace a moisturiser. The question is explored in can drinking more water fix dry skin.
06 / Beyond the face
Dry skin on the body and through life.
Dryness is rarely limited to the face. Hands are often the first place it shows, and the AAD suggests carrying a hand cream and applying it after each hand washing.[2] See hand care, dry elbows and knees and body lotion, cream or oil.
Skin also changes with age. A dermatologist quoted by the AAD advises that perimenopausal people and everyone aged 50 and over use a cream-based moisturiser, because skin holds less moisture with age.[3] See perimenopause and skin changes and skincare in your 50s and beyond.
Dry skin and breakouts can coexist; see can dry skin still be acne-prone.
When dryness needs a dermatologist
If your skin stays dry after you have followed the usual advice, the AAD recommends seeing a dermatologist. Very dry skin may be linked to an underlying medical condition, such as atopic dermatitis or psoriasis.[2]
Tell a dermatologist if anything you apply, including moisturiser, causes burning, stinging or irritation.[2]
For product questions short of that, a Skin Edit reviews what you use, and a consultation covers wider concerns.
A few common questions
Frequently asked questions.
What is the difference between dry and dehydrated skin?
Dry skin is described as lacking oil and is considered a skin type. Dehydrated skin is described as lacking water and is considered a temporary condition.[1] The terms are descriptive and the two can occur together.
Can oily skin be dehydrated?
Yes. Dehydration describes water, not oil, so skin of any type can be affected.
How do I know which one I have?
Which moisturiser is best for dry skin?
The AAD recommends an ointment or cream in preference to a lotion, and fragrance-free products.[2]
Will drinking more water fix dry skin?
Not on its own. Drinking more water does not fix a dry skin type, though it is good for general health.[1] A suitable moisturiser is still needed.
When should I see a doctor about dry skin?
If it does not improve with consistent care, or if it cracks, bleeds or stings when you apply products. Persistent dry skin can be a sign of an underlying condition.[2]
Sources & scope
This Journal article offers general skincare education and an explanation of two commonly confused skincare terms. It does not provide a diagnosis, prescribe treatment or replace individual medical advice. The points above draw on the following published resources.
- Dehydrated Skin: Symptoms, vs. Dry Skin, Test, Treatments, and More (Healthline) — how dehydrated skin and dry skin are distinguished.
- Dermatologists’ top tips for relieving dry skin (American Academy of Dermatology) — caring for dry skin and when to see a dermatologist.
- How to pick the right moisturizer for your skin (American Academy of Dermatology) — moisturiser types and how to choose between them.
- Skin care on a budget (American Academy of Dermatology) — how dry skin is described and applying moisturiser to damp skin.
- Cold weather and your skin (American Academy of Dermatology) — the effect of cold weather and indoor heating.
Editorial: Merve Akkaya Journal. Learn more about Merve Akkaya.
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