# The patient developed _____, a severe allergic skin reaction causing widespread redness and blistering.

> source: MyMerci (mymerci.kr)  
> url: https://mymerci.kr/pages/nclex_q.php?qn_id=168478  
> language: ko  
> subject: Diseases of the skin and subcutaneous tissue

## 문제

The patient developed _____, a severe allergic skin reaction causing widespread redness and blistering.

## 보기

1. urticaria **✔ 정답**
2. dermatitis
3. eczema
4. psoriasis
5. rosacea

**정답: 1**

## 해설

Urticaria, commonly known as hives, is a condition where red, itchy, and sometimes painful welts appear on the skin. It occurs when histamine and other chemicals are released by mast cells, causing small blood vessels to leak fluid into the skin. The condition can be acute or chronic, triggered by allergies, medications, infections, or stress.

## 임상 시나리오

URTICARIA

- Characterized by raised, red welts (wheals) on skin
- Triggered by histamine release from mast cells
- Common triggers: allergens, medications, food, stress
- Types: acute (6 weeks)
- Symptoms: itching, burning, stinging sensation
- Treatment options: antihistamines, corticosteroids
- Associated conditions: angioedema, anaphylaxis
- Diagnostic methods: physical examination, allergy testing
- Prevention: avoiding known triggers
- Risk factors: history of allergies, autoimmune disorders
- Clinical features: wheals appear/disappear within 24 hours
- Management: identify and eliminate triggers
- Complications: difficulty breathing if throat affected
- Related terms: hives, nettle rash, welts
- Emergency signs: throat swelling, breathing difficulty

## 핵심 개념

- **urticaria** — A skin condition characterized by raised, red, itchy welts caused by the release of histamine, resulting in fluid leakage from blood vessels into the skin
- **dermatitis** — An inflammation of the skin characterized by redness, swelling, itching, and sometimes blistering, often caused by contact with irritants or allergens
- **eczema** — A chronic skin condition causing dry, itchy, and inflamed patches of skin, often appearing in areas where skin flexes
- **psoriasis** — A chronic autoimmune condition causing rapid skin cell growth, resulting in thick, red, scaly patches on the skin's surface
- **rosacea** — A chronic inflammatory skin condition primarily affecting the face, causing redness, visible blood vessels, and sometimes small, red bumps

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