Typical Seborrheic Dermatitis

Description

Centered on the midface of an adult male, erythematous, poorly marginated patches involve the nasolabial folds, extending inferiorly toward the oral commissures and superiorly toward the alar bases where the folds meet the lateral nose. Subtle surface scale is suggested along the involved facial skin, with adjacent cheek skin remaining comparatively spared laterally. The scalp hairline and anterior scalp are included in the field, aligning with common seborrheic distribution, and the upper trunk is visible to provide dermatologic context. Seborrheic dermatitis concentrates in sebum-rich areas where Malassezia species and host inflammatory response intersect, so the nasolabial folds and scalp form a classic teaching pattern. Clinically, this helps distinguish seborrheic dermatitis from rosacea (more centrofacial with telangiectasia and papules), perioral dermatitis (often spares the vermilion border), and contact dermatitis (sharper borders with a clear exposure history). In practice, the same anatomic map becomes actionable: facial involvement often responds to low-potency topical corticosteroids or calcineurin inhibitors, while scalp scaling and “dandruff” are managed with antifungal shampoos such as ketoconazole or selenium sulfide. Dermatology and primary care curricula use this type of waist-up male presentation to teach lesion morphology (erythema with fine scale) and distribution-based diagnosis on the face and scalp. It also fits patient handouts and clinical guidelines discussing differential diagnosis of facial rash and counseling around chronic, relapsing seborrheic dermatitis in adults. Anatomical accuracy verified by SciePro's Medical Advisory Board.