A closed comedone is another name for which skin lesion?

A closed comedone is another name for which skin lesion?

• A. Blackhead
• B. Vesicle
• C. Whitehead
• D. Pustule

Answer: (C)

When a hair follicle is blocked but its opening stays closed, the sebum and keratin plug remains beneath the skin surface. This produces a small, pale bump called a whitehead. A closed comedone is therefore a whitehead because the plug is not exposed to air, so it doesn’t darken. In contrast, an open comedone—the plug is at the surface and oxidizes to look dark (a blackhead). A vesicle is a small fluid-filled blister, and a pustule contains pus from infection or inflammation, not a clogged pore.

When a hair follicle is blocked but its opening stays closed, the sebum and keratin plug remains beneath the skin surface. This produces a small, pale bump called a whitehead. A closed comedone is therefore a whitehead because the plug is not exposed to air, so it doesn’t darken. In contrast, an open comedone—the plug is at the surface and oxidizes to look dark (a blackhead). A vesicle is a small fluid-filled blister, and a pustule contains pus from infection or inflammation, not a clogged pore.