Which condition is characterized by skin cells building up to form scales and itchy dry patches?

• A. Acne Vulgaris
• B. Psoriasis
• C. Eczema
• D. Urticaria

Answer: (B)

This describes psoriasis, a chronic autoimmune condition where skin cells multiply rapidly. Normally the skin sheds every few weeks, but in psoriasis the turnover is much faster, causing cells to build up on the surface and form thick, raised patches with silvery scales that are often itchy and dry. The patches commonly appear on areas like the elbows, knees, scalp, and lower back, and flares can be triggered by stress, infections, or skin injury.

Acne vulgaris involves clogged pores and pimples rather than scaly patches. Eczema (atopic dermatitis) presents with dry, irritated, and very itchy red patches that may ooze or crust, but not the characteristic thick silvery scales. Urticaria (hives) are itchy welts that come and go in bursts, not persistent scaly plaques. The description of scales and itchy dryness most closely matches psoriasis.