Genital contact dermatitis

The genital region is uniquely susceptible to both irritant and allergic contact dermatitis (ACD) due to its delicate anatomy, moist environment, and frequent exposure to potential irritants and allergens. Factors such as friction, maceration, and overuse of hygiene products significantly compromise the skin barrier, increasing the risk of dermatitis. The region’s sensitivity is further exacerbated by physiological changes, such as reduced estrogen levels in postmenopausal women, which heighten susceptibility to external agents. A detailed clinical history plays a critical role in diagnosing genital contact dermatitis (CD). Key elements include symptom onset, triggers, hygiene habits, and exposure to products used personally or by sexual partners. This thorough exploration often identifies potential irritants and allergens overlooked in a routine examination. Irritant CD (ICD) in the genital area typically presents as burning, stinging, and erythema soon after exposure to irritants. Chronic ICD may lead to scaling and lichenification. In contrast, ACD arises from delayed hypersensitivity to allergens, presenting as pruritus, erythema, and, in severe cases, vesiculobullous eruptions. Common agents implicated in ICD include soaps, urine, sweat, and certain hygiene sprays, while ACD is often triggered by allergens such as fragrances, topical medications, preservatives, and rubber components. Patch testing is a cornerstone of diagnosing genital ACD. It identifies specific allergens responsible for the dermatitis and helps in differentiating between relevant and incidental reactions. Expanding patch test series to include additional potential allergens, such as personal care products or items used by partners, enhances diagnostic accuracy. The repeat open application test is another valuable tool, particularly when patch testing yields inconclusive results. Management of genital CD primarily involves strict avoidance of identified irritants and allergens. Patients should cease using unnecessary topical medications and adopt hypoallergenic alternatives. Education on proper genital care, including the use of fragrance-free and dye-free products, is essential. Topical corticosteroids, calcineurin inhibitors, or phosphodiesterase-4 inhibitors may be prescribed for short-term relief.