Maskne entered the dermatology lexicon during the COVID-19 era, capturing the acneiform eruptions sprouting along mask lines – chin, cheeks, and nasolabial folds. Mechanistically, it blends occlusion, friction, heat, and microbiome shifts. Extended mask wear traps humidity from breath and sweat, softening the stratum corneum so it becomes more vulnerable to mechanical shear. Concurrently, carbon dioxide accumulation nudges pH upward, fostering Cutibacterium acnes proliferation, while the occlusive microclimate amplifies sebum output. The result is a perfect storm of papules, pustules, and even humid-induced miliaria.

Prevention begins with mask hygiene. Dermatologists advocate rotating fresh, tightly woven cotton or silk masks every four hours and laundering with fragrance-free detergents to dodge perioral contact dermatitis. Surgical masks, though single-use, often prove gentler than rough fabric when changed appropriately. A thin application of non-comedogenic moisturizer creates a friction-reducing barrier film; ingredients like dimethicone or squalane provide slip without clogging pores.

Topical actives must strike a balance between antibacterial might and barrier support. Benzoyl peroxide, salicylic acid, and niacinamide form a trifecta: BPO slashes bacterial counts, salicylic acid clears follicular plugs, and niacinamide reduces inflammation while reinforcing ceramide synthesis. Yet over-zealous use can backfire when combined with mask abrasion, so frequency – once daily at night – becomes as critical as potency.

Behavioral tweaks help: remove the mask during solitary outdoor breaks, pat sweat rather than wiping, and sidestep heavy makeup beneath the mask zone. Breathable, silicone-based primers can outcompete oil-rich foundations, reducing occlusive load. Dermatologists have even trialed prophylactic dilute chlortetracycline sprays for healthcare workers in N95 masks, noting fewer inflammatory lesions.

When mask mandates ease, residual post-inflammatory erythema or hyperpigmentation can linger. Gentle niacinamide and azelaic acid brighten without rekindling irritation. In stubborn cases, pulsed-dye laser or IPL can quell vascular flare. Maskne underscores a universal truth: skin care is situational, adapting not just to seasons but to social habits. As masks remain part of many workplaces, a thoughtful, minimalist regimen – cleanse, protect, treat – will keep the lower face as calm as the new normal allows.