Winter Itch: Why Skin Itches With No Rash, and 4 Habits That Help

I'm Dr. Hongseok Kim, a board-certified Korean dermatologist with 21 years of practice and the medical director of VOS Dermatology Clinic in Gangnam, Seoul, in front of Dosan Park. At VOS I see every patient myself, from the consultation to the treatment.

Winter itch is one of the most common complaints I hear when the weather turns cold: "My skin looks completely fine, so why does it itch so much?" My own skin is very dry too; if I skip moisturiser, I get white flakes on my clothes. This page is based on my YouTube video from January 2024; I rewrote it for readers abroad. The video above can be watched with translated captions.

Why skin itches in winter with no visible rash

Itching without any visible change is typical of dry skin, and in winter it is most common on the back, outer thighs and outer arms (in the video at 00:58).

Patients often come in saying they itch, yet when I look, the skin is clean and shows no obvious symptoms. That is a feature of dry skin. When the dryness is obvious, people at least suspect it; often it isn't (in the video at 01:10). The itch tends to be worse at night, so people scratch in their sleep, sleep poorly and feel tired and stressed during the day (in the video at 01:21). Cold weather makes it worse: we turn on the heating, and people who sleep on warm Korean ondol floors have that heat right against their skin (in the video at 01:44).

Habit 1: drink enough water

Drink at least 2 litres of water a day, in small amounts throughout the day, and more if you drink coffee or alcohol (in the video at 02:24).

I notice this myself: when I weigh myself before bed and again in the morning, I am about 1 kg lighter, within roughly seven hours (in the video at 01:59). That loss comes from water leaving through the skin and through breathing. So the minimum intake from drinking should be at least 2 litres a day (in the video at 02:24). Coffee and alcohol have a diuretic effect, so you need more on those days (in the video at 02:37). You can't drink 2 litres at once, so sip throughout the day, and I prefer plain water to tea, since tea also has a mild diuretic effect (in the video at 03:02). How water intake relates to skin moisture is explained in my video note on skin hydration.

Habit 2: keep indoor humidity at 40 to 60%

Aim for 40 to 60% humidity indoors; in winter it is often far lower than you think (in the video at 03:18).

When I checked, the humidity around me was under 30%. Even with a humidifier running beside me, it would not go above 40% (in the video at 03:30). Indoor heating keeps the air very dry. If you can, use a humidifier. If you can't, hang two or three wet towels on a chair or a drying rack, spread out rather than folded so more surface can evaporate, and the humidity in the room will rise noticeably (in the video at 03:56).

Habit 3: change how you shower

Keep showers short and avoid hot water and scrubbing; very dry skin should be done in under five minutes (in the video at 05:54).

Long hot showers feel wonderful in winter, but hot water strips lipids and moisture from the skin (in the video at 04:35). Some people feel fine in a hot bath and start itching as soon as they dry off. The reason is that heat signals reach the brain before itch signals, like the first player to hit the buzzer in a game, so the itch is pushed back for a moment (in the video at 05:02). That is also why holding itchy skin near heat or a hair dryer feels so good; but the heat dries the skin further, and the cycle gets worse (in the video at 05:29).

Avoid Korean-style body scrubbing; scrubbing removes what the skin needs to hold on to moisture (in the video at 06:07). Skip rough shower towels too. If your skin is dry, use only soap and your hands, and finish within five minutes (in the video at 06:36).

Habit 4: use a fragrance-free moisturiser, generously

In winter, moisturise every day with a fragrance-free product, and apply more than feels necessary until the itch settles (in the video at 07:06).

You don't need a particular brand; barrier creams and the many products made for babies' atopic skin are all fine (in the video at 06:50). The one point I insist on is no fragrance. Itchy skin has a damaged barrier, and fragrance can irritate it further (in the video at 07:18). Don't spread it thinly at this stage: apply what feels like a little too much (in the video at 07:30). It will feel slightly sticky, but after a few days you won't need that much every day; use the larger amount only until the symptoms fade (in the video at 07:44). Scaling like fish scales on dry skin is also a sign of dryness. Press it down with more moisturiser; if you scrub it off because it looks untidy, you start the cycle again (in the video at 07:56). If moisturiser seems to leave your skin even drier, my note on Korean skin barrier repair explains why.

When to see a dermatologist

Many people struggle with this until around April or May; if the itch is still severe or the skin turns raw and oozing despite these habits, see a dermatologist for medication (in the video at 08:21).

In Korea, the Korean Dermatological Association website lets you search for board-certified dermatologists near you (in the video at 08:34). Wherever you live, describe your symptoms to a dermatologist and get a diagnosis; if treatment is needed, it really helps (in the video at 09:01). These habits sound like common sense, but they are surprisingly hard to keep. For an overview of when clinic care helps and when home care is enough, see my guide on Korea skin care, clinic vs routine, or browse the treatments at VOS. Our creator experiences at VOS show how visitors fit clinic visits into their trips.

Results vary from person to person, and the right care for your skin is decided at an in-person consultation.

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Results, swelling and recovery vary from person to person. This page is general information from VOS Dermatology Clinic based on Dr. Kim's video and does not replace an in-person consultation.