Dry VS Dehydrated Skin: How To Tell The Difference

Last Updated on February 23, 2026 by Giorgia Guazzarotti

dry vs dehydrated skin causes and treatment

Can skin be oily AND dry at the same time? Your skin has always been an oily nightmare. It has visible shiny patches on your forehead, gigantic pores on your t-zone and is always riddled with a pimple… or ten. But now winter’s coming round, you’re experiencing a sense of… tightness? Worse, it has even started to flake a little. Has your skin turned dry all of a sudden?!

Probably not. Your skin type rarely changes. But it can get dehydrated (ALL skin types can get dehydrated AT ANY TIME). Dehydrated skin looks a lot like dry skin. They have similar causes and symptoms, but if you treat them the same way and start slathering rich moisturisers all over, you’re gonna end up with a bad case of pimples and more oil slick than you ever thought possible. Ugh. Here’s how to tell the difference between dry and dehydrated skin and how to treat them:

Table Of Contents

What Is Dry Skin?

Dry skin is a skin type that lacks oil. It simply doesn’t produce enough. Sebum is your skin’s natural moisturiser. Too much of it gives you pimples and turns your skin shinier than a frying pan. But too little is bad, too. Without enough sebum, skin gets dry, feels tight all the time, and flakes like crazy.

How much oil your skin pumps out depends mostly on your genes, but weather and diet play a little part, too. Oh, and skin naturally gets drier with age as hormones, ceramides, and all that good stuff that helps skin stay healthy depletes. You know what this means? Dry skin ain’t a temporary condition. You can definitely improve it, but it’s something you’ll likely have for a long, long time.

Struggling to create a skincare routine that nourishes dry skin and makes it soft and supple again? Download your FREE “Best Skincare Routine For Dry Skin” cheat sheet to get started. It features product recommendations + right application order.

What Is Dehydrated Skin?

Dehydrated skin lacks water. It’s a temporary skin condition anyone – including the oiliest of skin types! – can experience every now and then. It happens when your skin’s protective barrier gets damaged. Water evaporates through the cracks, leading to dry and flaky patches. What damages your skin’s protective barrier? Here are the most common culprits:

Harsh cold weather
Over-exfoliating
Over-washing
Unprotected sun exposure

How Can You Tell If Your Skin Is Dry Or Dehydrated?

The first step is to identify your skin type. Is it dry or oily?

DRY SKIN	OILY SKIN
No visible oil on skin	Shiny
Rarely breaks out	Prone to acne, blackheads, and breakouts
Prone to cracking and flaking	Doesn’t crack nor flakes
Small, almost invisible pores	Large pores (especially in the T-zone)
Make-up settles into fine lines and flaky patches	Make-up slides off during the day
Thick moisturisers sink in quickly and provide relief	Thick moisturisers make your skin more oily and cause breakouts

If you’re struggling with this, do a simple test:

Wash your face with a gentle cleanser (if it makes your skin feel tight, it’s too strong).
Wait a couple of hours. During this time, don’t do anything to your skin. Don’t even apply moisturiser. Just wait.
After 2 hours, grab a tissue or blotting paper and pat it on your skin. If there are no oily spots on it, your skin is dry. If it’s covered in grease, it’s oily.

But… is your skin dehydrated too?

If your skin feels oily and dry at the same time, like the top layers are covered in grease but underneath it feels so tight and brittle, your skin is dehydrated.
If your skin is dry, it’s likely it’s dehydrated, too. Without enough sebum, your skin’s protective barrier gets broken down more easily and is unable to retain water in.

What Causes Dry Skin And Dehydrated Skin?

Dry skin and dehydrated skin have a lot in common. The causes are the same, yet the treatments are different. What causes them? Here are the main culprits:

Air conditioning: It dries out skin.
Alcohol-laden skincare (especially toners): Too much alcohol strips skin of its moisturising oils and makes water evaporate into thin air.
Excessive exposure to both very cold and very hot weather (always wear sunscreen!).
Harsh cleansers, soaps, and body washes. If your skin feels tight after cleansing, ditch them.
Harsh physical exfoliants and over-exfoliation: Think apricot kernels or using your Foreo Luna/acids too often. You don’t want to remove ALL dead cells. That disrupts the skin’s protective barrier and leaves your skin dry, red, and sore.
Long showers and baths. Hot water strips away your natural oils and damages your skin’s protective bar.
Overuse of harsh active ingredients: Retinol, Benzoyl Peroxide, and L-Ascorbic Acid (to name a few) can do wonders for your skin. But when you use too much too often, they disrupt your skin’s protective barrier too. Hello, dehydration!

How To Treat Dry Skin

Dry skin lacks oil. You can fix it by adding more oil into your skin. Easy, right? Here’s what to look for in your skincare products:

Oils, like marula, coconut, Argan, etc (you can use them in place of facial moisturisers)
Butters, like shea and cocoa
Ceramides
Niacinamide

These ingredients strengthen your skin’s protective barrier and add oil back into your skin, keeping in healthy and moisturised. While you’re at it, look for milk or oil-based cleansers that replenish moisture as they strip away dirt.

Best Picks:

CeraVe Hydrating Facial Cleanser ($16.99): One of the gentler cleansers you’ll get at the drugstore. Available at Boots, Cult Beauty, Look Fantastic, Sephora, Ulta and Walmart
CeraVe PM Facial Moisturizing Lotion ($20.99): It uses humectants that hyaluronic acid and glycerin to attract water into your skin and ceramides to moisturise skin without adding more oil to it. Available at Beauty Bay, Boots, Cult Beauty, Dermstore, and Ulta.
Drunk Elephant Lala Retro Whipped Cream ($60.00): A no-frills, rich cream that deeply moisturises skin. Available at Cult Beauty, Sephora, SpaceNK and Ulta.
Paula’s Choice Omega+ Complex Moisturizer ($35.00): One of the richest moisturisers I know, this baby is loaded with fatty acids to deeply moisturise even the driest of skin types. Available at Cult Beauty, Paula’s Choice, and Sephora
The Ordinary 100% Organic Cold-Pressed Rise Hip Seed Oil ($10.90): Super moisturising, this oil has anti-aging properties too. Available at Asos, Beauty Bay, Cult Beauty, SpaceNK, The Ordinary and Ulta

How To Treat Dehydrated Skin

Dehydrated skin lacks water. The solution is (you guessed it) to put water back into your skin. How? Humectants. It’s a fancy way of calling ingredients that draw moisture from the environment into your skin, helping to keep it hydrated. The most common humectants in skincare products are:

Glycerin
Hyaluronic Acid
Sorbitol
Urea

PRO TIP: Apply your moisturiser or hyaluronic acid serum while your skin is still damp. It helps seal in moisture that little bit better.

Best Picks:

Paula’s Choice Clear Oil-Free Moisturizer ($39.00): A lightweight moisturizer with niacinamide and antioxidants that strengthens your barrier without adding oil to it. Available at Cult Beauty and Paula’s Choice
La Roche Posay Heal B5 Hyaluronic Acid Serum ($42.99): A hydrating hyaluronic acid serum that plumps up skin. Available at Boots, Face The Future, Look Fantastic, Sephora, and Ulta
Niod Multi-Molecular Hyaluronic Acid (£30.00): The most hydrating and plumping serum I’ve tried, it has 13+ forms of Hyaluronic Acid to hydrate every layer of skin. Available at Beauty Bay, Cult Beauty, and Niod
Paula’s Choice Resist Hyaluronic Acid Booster ($39.00): A hyaluronic acid serum with ceramides to strengthen the skin’s protective barrier and heal dry skin. Available at Cult Beauty, Dermstore, Paula’s Choice, SpaceNK.

FAQs

Does drinking more water actually help dehydrated skin, or does hydration need to come topically?

Sorry to burst your bubble, but no. Chugging water all day isn’t going to save your skin. Dehydrated skin is a barrier problem, meaning water is escaping through the cracks in your skin faster than you can replace it. Drinking more water won’t patch those cracks up. You need to fix it from the outside with humectants and barrier loving ingredients. Now, if you’re barely drinking any water at all, yeah your skin is probably going to look dull and miserable. So keep drinking water for your health! Just stop expecting it to be some magical skincare cure. It isn’t.

How long does it take for dehydrated skin to recover once you make changes?

Here’s some good news for once. Dehydrated skin bounces back pretty fast once you figure out what’s wrecking your barrier and actually stop doing it. A lot of people start noticing a difference within a week or two which honestly feels like a miracle when your skin has been looking rough. Full barrier repair takes closer to 4 weeks but you won’t be sitting around waiting that long to see something change. Still struggling after 6 weeks of doing everything right? Go see a dermatologist. No shame in calling in the professionals.

In what order should you layer humectants, oils, and occlusives in a routine?

Lightest to heaviest, always. Start with your humectant serum while your skin is still a little damp from cleansing because that’s when it works best. Then moisturiser, then your facial oil on top. If you’re feeling extra, seal the whole thing in with an occlusive like a balm or a tiny bit of facial oil before bed. During the day though? Skip the occlusive. Nobody wants to show up to work looking like a glazed doughnut.

The Bottom Line

Dry skin and dehydrated skin have similar causes and symptoms, but different treatments. Identify what you’re dealing with, give skin what it lacks and watch it transform.

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