Which term describes raised, red, itchy patches on the skin indicating an allergic reaction?

Which term describes raised, red, itchy patches on the skin indicating an allergic reaction?

• A. Urticaria
• B. Eczema
• C. Dermatitis
• D. Rash

Answer: (A)

Raised, red, itchy patches that signal an allergic reaction are best described as urticaria, commonly known as hives. This condition results from histamine release in the skin, leading to small, edematous wheals that are intensely itchy and can appear anywhere on the body. Eczema refers to atopic dermatitis, a chronic condition with dry, scaly, thickened patches rather than transient wheals. Dermatitis is a broader term for skin inflammation from various causes, not specifically the allergic, wheal-form eruption seen with urticaria. Rash is a general descriptor for any skin eruption; urticaria is a particular type of rash characterized by raised, itchy welts due to an allergic trigger. Recognizing urticaria helps guide appropriate management, including antihistamines and monitoring for potential progression to airway involvement.

Raised, red, itchy patches that signal an allergic reaction are best described as urticaria, commonly known as hives. This condition results from histamine release in the skin, leading to small, edematous wheals that are intensely itchy and can appear anywhere on the body. Eczema refers to atopic dermatitis, a chronic condition with dry, scaly, thickened patches rather than transient wheals. Dermatitis is a broader term for skin inflammation from various causes, not specifically the allergic, wheal-form eruption seen with urticaria. Rash is a general descriptor for any skin eruption; urticaria is a particular type of rash characterized by raised, itchy welts due to an allergic trigger. Recognizing urticaria helps guide appropriate management, including antihistamines and monitoring for potential progression to airway involvement.