
Atopic dermatitis

Rosacea (rhinophima)

Contact dermatitis

Seborrheic dermatitis

Atopic dermatitis

Lichen planus

Polymorphous light eruption

Eythema multiforme

Seborrheic keratosis

Polymorphous light eruption

Rosacea

Lichen planus

Seborrheic dermatitis

Perioral dermatitis

Atypical nevus

Erythema multiforme

Erythema nodosum

Nummular eczema

Psoriasis

Type IV (contact allergic dermatitis)

Dermatofibroma

Allergic contact dermatitis

Seborrheic dermatitis (cradle cap)

Autosensitization dermatitis aka “id reaction”
(An itchy, dyshidrotic-like vesicular eruption on the fingers, forearms, thighs, legs, trunk)

Acne vulgaris

Junctional nevi

Erythema multiforme (triggered by herpes infection)

Dyshydrotic eczema (aka pompholyx)

Hidradenitis suppurativa

Rosacea

Pityriasis rosea

Lichen simplex chronicus

Asteatotic dermatitis

Lichen planus

Irritant contact dermatitis

Superficial BCC

Atopic dermatitis

Keratoacanthoma

Atopic dermatitis

Rosacea

Actinic keratosis

Actinic keratosis

SCC

Nodular melanoma

Actinic keratosis

Guttate psoriasis

Lentigo maligna melanoma

B. Nickel (allergic contact dermatitis)

Psoriasis

Acral lentiginous melanoma

SCC

Keratosis Pilaris (common in atopic derm)

Allergic contact dermatitis

Keratosis pilaris is not a ddx, does not occur on face.

Hidradenitis suppurativa

Dyshidrotic eczema (aka pompholyx)

BCC

Atopic dermatitis

Psoriasis

Psoriasis

Lichen planus

Lichen simplex chronicus

Polymorphous light eruption

Actinic keratosis

Lichen simplex chronicus

Actinic keratosis

Seborrheic dermatitis

Nummular eczema

Keratosis pilaris, common in atopic derm

BCC

Nodular melanoma

Perioral dermatitis

Actinic keratosis

Rosacea

Lichen simplex chronicus

Keratoacanthoma

Psoriasis

Polymorphous light eruption

Psoriasis

Dermatofibroma

Atopic dermatitis

Irritant contact dermatitis

Seborrheic keratosis

Atopic dermatitis

Pityriasis rosea

Autosensitization dermatitis (“id reaction”)

Dermal nevus

Perioral dermatitis

SCC