K-Beauty Skin Concern Glossary

Blackheads are open comedones — clogged pores whose contents oxidize on air exposure and turn dark. They cluster on the nose, chin, and forehead in oily and com…

Hormonal acne is inflammatory breakout that flares in response to androgen fluctuations — most visibly on the jawline, chin, and lower face. Lesions are typical…

Maskne is friction- and humidity-induced breakout from prolonged mask wear. It typically clusters along the chin, jawline, and cheeks where the mask makes conta…

Teen acne is the most common form of acne, driven by puberty-onset androgen surge increasing sebum production. Lesion patterns mix whiteheads, blackheads, and i…

The 30s are the prevention decade — collagen synthesis begins its decline and early UV damage starts to surface. Routines lean preventive: daily sunscreen, gent…

Skin in the 40s typically shows visible collagen loss, slower turnover, and combined concerns — fine-to-deeper lines, uneven tone, and reduced firmness. A routi…

A compromised barrier is the result of over-stripping the skin — through too-frequent exfoliation, harsh cleansers, aggressive stacking of actives, or environme…

Dehydrated skin lacks water, not oil — distinct from "dry skin," which lacks lipids. It can occur on any skin type, including oily skin, and presents as tightne…

Dry skin produces insufficient skin lipids — distinct from "dehydrated skin," which lacks water. It appears flaky, sometimes itchy, and is more prone to fine li…

Eczema-prone skin has a chronically compromised barrier — itchy, dry, easily inflamed patches that flare with triggers. Topical care focuses on barrier repair l…

During pregnancy, certain topical ingredients are flagged for caution either due to documented or theoretical risk to the fetus. Routines simplify around safe h…

Hyperpigmentation covers a spectrum — sun-driven sun spots, melasma (hormonal patches), and post-inflammatory marks left by acne or irritation. Each subtype res…

Dull skin reads as flat or tired due to a mix of dehydration, slow turnover, uneven tone, and surface buildup. It is a multi-cause appearance issue rather than …

Persistent facial redness can range from temporary flushing to rosacea — a chronic inflammatory condition with visible vessels, papules, and triggers like heat,…

Sensitive skin reacts more easily than average to actives, fragrance, environmental stress, or even mechanical friction — with stinging, redness, or transient b…

Combination skin shows oily T-zone (forehead, nose, chin) alongside drier cheeks — meaning a single product strategy rarely fits the whole face. Zone-targeted r…

Pore size is largely genetic and influenced by sebum production, sun damage, and loss of supporting collagen. While true pore "size" cannot be reduced topically…

Oily skin produces more sebum than average — sometimes everywhere, sometimes concentrated in the T-zone. It often comes with larger-looking pores and a tendency…