A sudden redness of the skin is known as?

Appeared in: RRB Staff Nurse Mumbai-2015

Explanation

A flush is the correct medical term for a sudden, temporary redness of the skin.
This redness is caused by vasodilation, which is the widening of small blood vessels near the skin surface, leading to increased blood flow.
Common triggers include fever, exercise, emotional stress (like blushing), and consumption of alcohol.
The image provided visually confirms that redness of the skin is termed erythema or flush.

Option B: Cyanosis is a bluish or purplish discoloration of the skin and mucous membranes, not redness. It indicates a lack of oxygen in the blood (hypoxia).
Option C: Jaundice is a yellowish discoloration of the skin, mucous membranes, and the whites of the eyes (sclera). It is caused by high levels of bilirubin in the blood (hyperbilirubinemia).
Option D: Pallor is an unusual paleness or lack of color in the skin. It is caused by reduced blood flow and oxygen or a decreased number of red blood cells.

Visual 1: Infographic: A comparative chart showing the four key skin color changes (Flush, Cyanosis, Jaundice, Pallor) as they appear on both light and dark skin tones, highlighting the best areas for assessment (e.g., conjunctivae, palms, sclera).

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain The question tests the knowledge of basic medical terminology used in skin assessment, specifically the term for redness of the skin as background academic context rather than a clinical decision trigger.
Rapid Assessment: Skin color is a vital sign that nurses can assess quickly to get immediate clues about a patient's circulatory and oxygenation status.
Differential Diagnosis: Differentiating between these color changes is critical. For example, mistaking the redness of a fever (flush) for an allergic reaction could delay appropriate treatment.
Patient Safety: Recognizing cyanosis promptly can be life-saving, as it signals severe hypoxia requiring immediate oxygen therapy and intervention.

How to Approach the Question

This is a direct recall question testing medical terminology.
First, identify the key descriptor in the question stem: 'sudden redness of the skin'.
Next, evaluate each option against this descriptor.
Recall or deduce the meaning of each term: 'Flush' means redness, 'Cyanosis' means blue, 'Jaundice' means yellow, and 'Pallor' means pale.
Match the descriptor 'redness' with the correct term, 'Flush'.
Eliminate the other options as they describe different color changes.

Concept Tested & Keywords

Concept Tested: The question tests the knowledge of basic medical terminology used in skin assessment, specifically the term for redness of the skin.
Stem keywords: sudden redness, skin
Lead-in keywords: known as

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