Hives (Urticaria)
Sudden-onset hives that cause swelling and itching – differences between acute and chronic conditions.
A rash that appears somewhere, disappears after a few hours, and then reappears in another location.
Hives are characterized by raised welts that appear like mosquito bites, disappear within a few hours, and then reappear in different locations.
- Acute hives (less than 6 weeks) can be caused by food, medications, or infections, but in more than half the cases, the cause cannot be identified. They are usually well controlled with antihistamines.
- If you experience swelling of the lips or eyes, difficulty breathing, or a feeling of tightness in the throat, these are warning signs of anaphylaxis – call 119/emergency room immediately.
- If hives persist for more than 6 weeks, it is considered chronic urticaria. Food allergies are rarely the cause, and most cases occur without a specific identifiable trigger.
Source: 질병관리청 국가건강정보포털 · as of 2026-08-13
Chronic urticaria: Consistent management is more important than frequent tests.
Chronic urticaria is more of a condition that requires medication to manage symptoms until it subsides (for months to years) rather than a disease where you "find and eliminate the cause."
- Antihistamines taken regularly are the foundation, and the dosage can be adjusted by increasing or combining them (primarily using 2nd generation drugs with less drowsiness).
- If standard treatment is not effective, there are higher-level treatments such as biological agents (omalizumab) available (dermatology/allergy department).
- Hot baths, alcohol, pain relievers, and tight clothing can also be aggravating factors.
Frequently asked questions
Should I get all possible food allergy tests done?
In chronic urticaria, indiscriminate food allergy tests are usually not helpful. Food allergy tests are meaningful only when there is a clear pattern of repeated symptoms occurring within 2 hours after eating specific foods.
Could it be because of stress?
Stress can be a contributing factor, but it is not the only cause. Instead of blaming yourself, it's more realistic to focus on taking your medication regularly and managing the condition.
Sources for this page
· 질병관리청 국가건강정보포털 (as of 2026-08-13)Last checked: 2026년 8월 13일
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