Which skin condition is characterized by silvery scales on red patches?

• A. Psoriasis
• B. Atopic dermatitis
• C. Contact dermatitis
• D. Acne

Answer: (A)

The skin condition characterized by silvery scales on red patches is psoriasis. This chronic autoimmune disorder results from an accelerated skin cell production cycle, leading to thick, scaly patches that can appear on various parts of the body, including the elbows, knees, scalp, and lower back. The silvery scales are a result of the rapid buildup of skin cells, which form a thickened layer and ultimately flake off.

Psoriasis is often associated with chronic inflammation, and the appearance of the red patches with silvery scales is a distinguishing feature of the condition. These patches can also be itchy and painful, and they may vary in size and location on the body.

In contrast, atopic dermatitis primarily manifests as itchy, inflamed skin without the characteristic silvery scales, while contact dermatitis arises from an allergic reaction or irritation and typically involves red, itchy, and sometimes blistering skin but lacks the specific scaling seen in psoriasis. Acne, which affects hair follicles and sebaceous glands, results in pimples, blackheads, and cysts rather than the red, scaly patches characteristic of psoriasis.