Presents as a persistent, well-demarcated, erythematous, scaly plaque, which requires a biopsy for confirmation unlike most inflammatory causes.
Characterized by beefy-red erythema with classic satellite pustules or papules, and a positive KOH preparation or fungal culture.
Appears as ill-defined erythema with scaling and possible weeping or lichenification, often related to irritants or allergens.
Identified by a persistent, eczematous-appearing plaque that is unresponsive to topical steroids and requires biopsy showing Paget cells.
Distinguished by markedly thickened, leathery skin (lichenification) with exaggerated skin lines resulting from chronic scratching.
Presents with sharply demarcated, bright red erythema, often with fissures and tenderness, and is confirmed by a positive bacterial swab.
Shows well-demarcated, erythematous plaques with a silvery scale, often with evidence of psoriasis elsewhere on the body.
Diagnosed by identifying nits (eggs) attached to pubic hairs or visualizing the lice themselves, a feature not present in other causes.
Suspected with intense nocturnal itching and the presence of burrows, particularly if other family members are also affected.
Appears as a chronic, non-healing ulcer or a nodular, indurated lesion that requires a biopsy for definitive diagnosis.
Features an annular plaque with a raised, active border and central clearing, confirmed by seeing hyphae on a KOH prep.
Characterized by atrophic, white, 'cigarette paper'-like skin, often with purpura and architectural changes like effacement of the labia minora or phimosis.
