A rare eruption of grouped, reddish-brown papules that can occur in the axilla, but more typically affects the face.
A yeast infection (intertrigo) presenting as a beefy red, moist rash with characteristic satellite pustules at the border of the main rash.
A genetic disorder with persistent, greasy, crusted, keratotic papules in a "seborrheic" distribution, including the neck, axillae, and groin.
A genetic disorder presenting as a unique pattern of reticulated (net-like) brown-black hyperpigmentation in the skin folds.
Atopic dermatitis in children and adults classically presents as itchy, erythematous, and lichenified (thickened) plaques in the flexures (antecubital and popliteal fossae).
A bacterial infection causing well-demarcated, reddish-brown patches with fine scale in the axillae and groin that fluoresce coral-red under a Wood's lamp.
A rare condition of intensely itchy, skin-colored follicular papules in the axillae and pubic area caused by blockage of apocrine sweat glands.
A genetic blistering disease with painful, recurrent erosions, vesicles, and macerated plaques that form in a "cobblestone" pattern in the neck, axillae, and groin.
A chronic inflammatory condition with recurrent, painful, deep-seated nodules, abscesses, sinus tracts, and double-ended comedones in the axillae and groin.
A general term for inflammation of skin folds due to friction and moisture, presenting as a simple, erythematous, macerated rash.
A variant of lichen planus that affects intertriginous areas, presenting as violaceous or erythematous plaques that often lack the typical surface scale.
A genetic disorder of elastic fibers, causing small, yellowish, "cobblestone" or "plucked chicken skin" papules in the flexures, especially the neck and axillae.
Inverse psoriasis presents as well-demarcated, bright red, shiny plaques without the typical silvery scale in the axillae, groin, and under the breasts.
Symmetrical Drug-Related Intertriginous and Flexural Exanthem is a specific drug reaction causing a symmetric, sharply demarcated, erythematous rash in the gluteal and inguinal folds.
A fungal infection of the groin (tinea cruris or "jock itch") presenting as an erythematous, scaling plaque with a raised, active border that spares the scrotum.
A bacterial infection of the axillary hair shafts, forming yellow, red, or black concretions or nodules around the hair, but not a rash on the skin itself.
A rare histiocytic disorder with numerous, reddish-yellow or brown papules that coalesce into plaques, with a predilection for flexural areas and mucous membranes.
