What is the primary cause of acne vulgaris?

• A. Excessive sun exposure
• B. Blockage of hair follicles
• C. Allergic reactions to skin care products
• D. Genetic predisposition

Answer: (B)

The primary cause of acne vulgaris is the blockage of hair follicles, which occurs due to the accumulation of sebum (oil) and dead skin cells. These blockages create an environment conducive to the growth of bacteria, particularly Propionibacterium acnes, leading to inflammation and the characteristic lesions associated with acne. This process can be exacerbated by hormonal fluctuations, especially during puberty, which increase oil production in the skin.

Understanding the role of follicular blockage is crucial, as it highlights why treatments often focus on keeping pores clear through proper skincare, exfoliation, and sometimes medications that regulate oil production. Other factors can contribute to the severity and occurrence of acne, but the fundamental issue of hair follicle blockage remains the primary mechanism behind the condition.