Acne Vulgaris: Comprehensive Management Guide

Overview / Definition Acne vulgaris is a chronic inflammatory skin condition that affects the pilosebaceous units, resulting in the formation of comedones, papules, pustules, and in severe cases, nodules and cysts. It is primarily observed in adolescents but can persist into adulthood. The condition can lead to significant psychological distress and physical scarring. Epidemiology Acne vulgaris is one of the most prevalent skin disorders worldwide, affecting approximately 85% of adolescents between the ages of 12 and 24. The incidence varies by demographic factors, with higher rates reported among males during adolescence, while females are more frequently affected in adulthood. Peak incidence typically occurs between ages 15-18. Acne can persist or emerge in adulthood, affecting up to 5% of adult males and 12% of adult females. Family history plays a significant role in susceptibility. Pathophysiology / Mechanism The pathogenesis of acne vulgaris involves a combination of four key factors: Increased Sebum Production: Hormonal changes, particularly androgens, stimulate sebaceous gland activity. Follicular Hyperkeratinization: Abnormal shedding of keratinocytes leads to clogged pores. Colonization by Propionibacterium acnes: This bacterium proliferates in the clogged follicles, contributing to inflammation. Inflammatory Response: The immune response to P. acnes and other factors results in the formation of inflammatory lesions. Clinical Presentation Acne vulgaris can present in various forms, which can be classified as: Non-inflammatory lesions: Open comedones (blackheads) Closed comedones (whiteheads) Inflammatory lesions: Papules Pustules Nodules Cysts Lesions most commonly occur on the face, back, and shoulders. Patients may also experience post-inflammatory hyperpigmentation or scarring. Diagnosis / Workup The diagnosis of acne vulgaris is primarily clinical, based on the appearance and distribution of lesions. A thorough history and physical examination are esse