Urticaria: itchy wheals that move around, and the version that is an emergency

Hives are raised, itchy wheals that typically appear and fade within hours, often disappearing from one spot and surfacing in another — the individual wheal is short-lived even when the episode drags on for weeks. Most acute episodes settle, but hives with swelling of the lips, tongue or throat, difficulty breathing, or faintness are a medical emergency: call emergency services immediately. Anything persisting beyond about six weeks is chronic urticaria and needs a doctor.

The emergency part, first

If hives come with swelling of the lips, tongue, mouth or throat, a tight or hoarse voice, wheezing or breathing difficulty, vomiting with collapse, or lightheadedness and faintness, treat it as an emergency and call for help immediately. Do not wait to see whether it settles, do not drive yourself, and do not look for a cream. Anyone who has been prescribed emergency medication for allergic reactions should use it as they were instructed. This is the one section on this page that is not about skincare at all.

How a wheal behaves

두드러기 (dudeureogi) presents as raised pale or pink swellings on red skin, intensely itchy, blanching when pressed, and varying from a few millimetres to large joined patches. The defining feature is impermanence: an individual wheal typically resolves within a day, leaving no mark, while new ones appear elsewhere. Tell your doctor if a single lesion lasts longer than a day, is painful rather than itchy, or leaves a bruise or stain, because that changes the picture and points somewhere else.

Triggers, and the honest caveat

Acute episodes can follow infections, medicines, foods or insect stings, and some people react to physical stimuli — pressure, cold, heat, sunlight, exercise. Chronic urticaria is the frustrating case: in a large share of it no external trigger is ever identified, and it is not an allergy in the everyday sense. Elimination diets and expensive intolerance panels are widely marketed for it and rarely deliver. A clinician can investigate sensibly; the internet's confident answers on this topic mostly are not.

What skincare can and cannot do

Very little, and that is worth stating plainly. Keep skin cool, since heat aggravates itch — cool showers, a cool room, loose cotton clothing, no hot baths or saunas while flaring. Use a bland, fragrance-free moisturiser for comfort and skip actives, acids and retinoids on affected skin. Scratching prolongs things. Medication decisions, including anything from a pharmacy shelf, belong to a doctor or pharmacist who knows your history, and long-running hives need proper assessment rather than management by lotion.

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✍️ Written & reviewed by the KoreaPlus Editorial team — dermatologist-informed, cosmetic-science researched & source-cited. Last reviewed: 2026-08-23.

General educational information using cosmetic structure-function wording — not medical advice. Always patch-test new actives. © KoreaPlus.