Dry skin: causes and the active-ingredient guide

At a glance

  • Dry skin feels tight, flakes and itches because it lacks moisture and oil and the natural protective barrier is weakened.
  • The causes range from external ones, such as winter and hot washing, through age to skin conditions like atopic dermatitis and internal causes such as an underactive thyroid.
  • For care, the ingredient counts, not the brand: humectants such as glycerin and urea bind water, replenishing lipids seal it in.
  • Regular moisturising on slightly damp skin, mild and lukewarm washing and avoiding irritants are the most important levers.
  • See a doctor if the skin itches strongly or cracks despite care, if further symptoms occur or if there is itching all over the body without a rash.

Almost everyone knows it: skin that feels tight and rough, flakes and sometimes itches. Dry skin, technically xerosis cutis, is one of the most common skin topics there is and in most cases harmless. Still, a closer look pays off, because dry skin is not always just the winter. This guide explains the most important causes, from external influences through age to conditions such as atopic dermatitis or an underactive thyroid, and gives you a neutral active-ingredient guide. This way you find the right care based on the ingredients, instead of letting brand promises guide you.

Dry skin develops when the top layer of skin contains too little moisture and oil. As a result, the natural protective barrier becomes more permeable, the skin loses more water and reacts more sensitively. Typical are a feeling of tightness, a rough, dull surface, fine flakes and itching, and in stronger forms also fine cracks.

Causes: where does dry skin come from?

The triggers can be divided into four groups. Often several come together.

  • External influences: Cold, dry air in winter and warm heated air draw moisture out of the skin. Hot or frequent showering, harsh soaps and cleansers, wind, sun and chlorine also dry the skin out.
  • Age: Over the years the skin produces less oil and stores less water. Aging skin therefore becomes drier and more sensitive by nature.
  • Skin conditions: With atopic dermatitis and psoriasis the skin barrier is disturbed from the ground up, the skin is dry, irritated and prone to itching and redness.
  • Internal and hormonal causes: An underactive thyroid, often due to Hashimoto's thyroiditis, makes the skin dry and rough. Diabetes, an iron deficiency, the menopause or certain medications can also encourage dry skin.

This classification helps to place your own situation. Dry skin only on the lower legs in winter points more to external triggers. If, on the other hand, persistently dry skin all over the body comes together with fatigue or feeling cold, it is worth looking at internal causes such as the thyroid.

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Active-ingredient guide: what matters in the cream

Instead of looking at the brand, it pays to look at the ingredients. Good care for dry skin combines two principles: it draws moisture into the skin and at the same time seals it in. Two groups of ingredients take care of that.

  • Humectants such as glycerin, urea or hyaluronic acid attract water and bind it in the skin.
  • Replenishing lipids such as plant oils, ceramides or shea butter form a protective layer on the skin and prevent the moisture from evaporating again.

The most effective is a combination of both groups. The overview below sorts the most important ingredients so you recognise them on the packaging.

Ingredient What it does For whom and when
Glycerin Binds moisture, very well tolerated and mild For almost everyone, including sensitive skin and children
Urea Binds moisture, dissolves calluses at higher concentration and has a mild anti-itch effect For very dry, rough areas such as elbows, knees and feet; not on broken or inflamed skin, low dose on the face
Hyaluronic acid Binds a lot of water, feels light For a moisture boost, also with rather normal skin
Panthenol (dexpanthenol) Soothes, supports regeneration, strengthens the barrier For irritated, sensitive or stressed skin
Ceramides and lipids Rebuild the protective skin barrier Especially useful with atopic dermatitis and very dry skin
Plant oils, shea butter, lanolin Replenish richly and seal in moisture For very dry skin and the cold season

Urea or glycerin?

These two ingredients appear most often and complement each other well. Glycerin is especially mild and well tolerated and is suitable for sensitive skin, the face and children. Urea is a classic for very dry and rough skin. At a low concentration it provides moisture, at a higher one it dissolves calluses and eases itching. Important: on broken, cracked or inflamed skin urea can sting, on the face low concentrations make sense, and with infants and small children it should only be used after medical advice. Here glycerin-based products are the milder choice.

What else to watch: with very dry skin, rich creams and ointments work better than thin lotions. Irritating additives such as alcohol, fruit acids and fragrances, on the other hand, do not belong in the care of dry skin. Rather choose fragrance-free products, as creams declared as unscented can also contain fragrances to mask odour. A quick look at the ingredient list therefore always pays off.

Lotion, cream or ointment?

Besides the ingredients, the texture decides how well a care product suits your skin. As a rule of thumb: the drier the skin, the more lipid-rich the product may be. A lotion contains a lot of water, absorbs quickly and is enough for only slightly dry or normal skin. A cream is more balanced between water and oil and a good all-rounder for everyday use. An ointment is particularly lipid-rich and contains little or no water, which makes it ideal for very dry areas or for the night. In winter and on heavily used areas such as hands, elbows and shins, the care may well be richer than in summer. On the face and with rather oily skin, lighter textures that do not feel heavy are more pleasant.

How to care correctly: the simple routine

With a few habits dry skin can improve noticeably.

  • Wash lukewarm rather than hot: Hot water draws oil out of the skin. Shower for a shorter time and lukewarm, and use mild, soap-free washing products.
  • Moisturise on damp skin: Apply the care right after washing on slightly damp skin, which seals in the moisture better.
  • Regularly rather than rarely: Daily moisturising, ideally several times, brings more than occasional, very rich applications.
  • Mind the room climate: Especially in winter, provide a skin-friendly room climate with airing and some humidity.
  • Avoid irritants: Protect the skin from cold and wind, avoid harsh cleansers and scratchy fabrics directly on the skin.

Hands, face, legs: what matters where

Dry skin shows up differently depending on the body area, and the care may reflect that. On the hands, frequent washing, disinfectants and dish soap cause dry, cracked skin. Here it helps to moisturise after every wash and to use a rich hand cream at night. The face has thinner, more sensitive skin, so mild, fragrance-free products fit and urea only at a low concentration. The lower legs and shins are particularly often dry, especially in older age, and tolerate a rich, lipid-rich care well. The lips have no oil glands and need a lipid-rich balm, especially in the cold. Knowing which area tends to dryness lets you prevent it there specifically, rather than using the same product everywhere.

Dry skin in children and in older age

Children's skin is especially sensitive. Here mild, glycerin-based products are the better choice, while higher urea concentrations should be avoided or only used after medical advice. With atopic dermatitis a consistent basic care is the foundation. In older age the skin becomes drier by nature, because it produces less oil and stores water less well. Gentle cleansing, regular and rich moisturising and attention to the lower legs prevent cracks and discomfort. Since dry aging skin itches and cracks more easily, consistent, mild care is especially important here.

Itching and warning signs: when to see a doctor

Dry skin often itches because the weakened barrier reacts more sensitively to stimuli. This usually improves with good care. In some cases medical advice makes sense.

Have it medically assessed

See a practice if the skin stays very dry despite good care, itches strongly, weeps, becomes inflamed or cracks. Be attentive too if, alongside the dry skin, signs such as fatigue, feeling cold, weight change or hair loss occur, which can point to the thyroid. Strong itching all over the body without a visible rash can rarely indicate an internal condition and should be assessed.

If a skin condition is behind it, targeted treatment helps. Read more about the most common form in our article on atopic dermatitis. If you suspect an underactive thyroid as the cause, you will find background in our article on Hashimoto. And if the itching in particular bothers you, our article on itching can help.

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How to prevent dry skin

A lot can be prevented by not straining the skin unnecessarily. Shower briefly and lukewarm rather than long and hot, and use mild, soap-free cleansers. Moisturise right after washing and use care on stressed areas preventively, instead of waiting until the skin feels tight. Protect your hands in the cold and when cleaning with gloves, and provide some room humidity especially in winter. Good sun protection and a balanced diet also support a healthy skin barrier. Anyone who makes these habits a routine struggles less often with dry, tight skin and needs less rich special care when it does occur.

When it might be atopic dermatitis

Not every dry skin is just dry skin. If it not only feels tight but itches strongly, occurs in flare-ups and comes with reddened, inflamed or weeping areas, often in the elbow folds, the backs of the knees, on the neck or face, atopic dermatitis can be behind it. It often exists since childhood, and hay fever or asthma run in the family. Then a dermatology assessment makes sense. A consistent basic care stays important, and during a flare anti-inflammatory remedies are added. The earlier atopic dermatitis is recognised and treated, the better the itching can be controlled and the less often flares occur.

Common myths about dry skin

Several myths persist around dry skin. Drinking a lot does not make the skin noticeably more moist with a normal fluid intake, care from outside is more decisive. It also does not apply across the board that the more lipid-rich the better: what matters is the mix of moisture and oil, matched to the state of the skin. Frequent or rough exfoliation tends to harm dry skin rather than help it. And finally, dry skin needs care not only in winter, because sun, air conditioning and frequent bathing dry it out in summer too. Another myth is that expensive products automatically work better: what matters are the ingredients and the texture that suits your skin, not the price or the brand name.

The bottom line: dry skin is usually harmless and can be managed well with the right care. What matters are the right ingredients, mild washing and regular moisturising. If the skin stays stubbornly dry anyway or further symptoms appear, it is worth looking at possible internal causes, together with medical help. Anyone who knows the right ingredients can choose the care specifically and is no longer dependent on advertising promises.

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Frequently asked questions about dry skin

The most effective step is regular moisturising with a product that binds moisture and at the same time replenishes lipids. Apply the cream ideally right after showering on slightly damp skin. Wash with lukewarm rather than hot water, for a shorter time and with mild products. For very dry skin, creams and ointments are more suitable than thin lotions.
Both bind moisture in the skin and complement each other well. Glycerin is very mild and also suitable for sensitive skin and children. Urea cares for very dry, rough areas particularly well and has a mild anti-itch effect, but can sting on broken or inflamed skin. On the face, low concentrations make sense.
Common are external triggers such as cold, dry heated air in winter, hot or frequent washing and harsh cleansing products. With age the skin becomes drier by nature. Skin conditions such as atopic dermatitis and internal causes such as an underactive thyroid, diabetes or hormonal changes can also be behind it.
Yes. An underactive thyroid, often due to Hashimoto's thyroiditis, can make the skin dry, rough and pale. Typical are additional signs such as fatigue, feeling cold, weight gain or hair loss. If such symptoms occur together with persistently dry skin, a medical assessment with a blood test is worthwhile.
More important than the brand are the ingredients. A combination of humectants such as glycerin, urea or hyaluronic acid and replenishing lipids that seal in the moisture makes sense. For very dry skin, rich creams or ointments are suitable. Avoid irritating additives such as alcohol, fruit acids and fragrances, and choose fragrance-free products.
Dry skin feels tight and itches because the weakened skin barrier reacts more sensitively to stimuli. Good care usually eases this. But if strong itching persists despite care or affects the whole body without a visible skin change, this can point to an internal cause and should be medically assessed.
Seek medical advice if the skin stays very dry despite good care, itches strongly, weeps, becomes inflamed or cracks, if signs such as fatigue, feeling cold or weight change occur alongside the dry skin, or if there is itching all over the body without a visible rash. With suspected atopic dermatitis an assessment is also sensible.
Drinking enough is healthy, but with normal fluid intake, drinking extra does little for dry skin. Far more important is care from outside and avoiding triggers such as hot water and harsh cleansers. With a real fluid deficiency, however, the skin can indeed feel dry.
In winter the cold outdoor air and the warm heated air dry out the skin especially. Moisturise more richly than in summer, wash lukewarm and for a shorter time, air the rooms regularly and add some humidity with humidifiers or bowls of water. Protected hands and lips benefit from a more lipid-rich care.

Sources

  • German Dermatological Society (DDG): position paper on diagnosis and treatment of xerosis cutis. Accessed 2026.
  • gesund.bund.de and Gesundheitsinformation.de (IQWiG): Dry skin and atopic dermatitis. Accessed 2026.
  • Consumer and professional information on skincare ingredients such as urea and glycerin. Accessed 2026.

This article is for general information and does not replace medical advice, diagnosis or treatment. Information on ingredients and care is kept general. With persistently dry, strongly itching, weeping or inflamed skin, or with signs of an internal cause, please contact a medical or dermatology practice.