An adolescent female's vulvitis is most likely related to which causative factor?

• A. Contact with fabric dyes.
• B. Frequent sexual activity.
• C. Urinary incontinence.
• D. Menarche.

Answer: (A)

Vulvar itching and irritation in adolescent girls is commonly due to irritant or allergic contact dermatitis from substances that touch the vulvar skin, especially fabric dyes in underwear. The delicate skin here is easily irritated, and dyes or fragrances in fabrics and detergents are frequent triggers, leading to redness, itching, and burning. This makes contact with fabric dyes the most likely factor.

Other options don’t fit as well: frequent sexual activity can raise concern for infections but isn’t a typical first cause of noninfectious vulvar dermatitis in this age group; urinary incontinence can cause irritation from urine exposure but isn’t the commonest cause of vulvitis; menarche is just puberty onset and doesn’t directly cause vulvar inflammation. If symptoms persist, addressing irritants and using softer, unscented products with breathable cotton underwear is helpful, and further evaluation can be done for infections or dermatologic conditions if needed.