Papulosquamous disorders

Contact Dermatitis

Type 4 Hypersensitivity

Common causes include:

Chemicals (also Poison Ivy)
Detergents
Irritants

Tx: AVOID THE IRRITANT, topical steroids

Eczema (Atopic Dermatitis)

Triggers include: sweat, allergens, irritants

Erythematous plaques/blisters that crust over and itch

**MC ON FLEXOR SURFACES**

(Back of knees, elbow creases)

Tx: AVOID IRRITANT, emollients, topical steroids

(Common locations of eczema)

Lichen Planus

Purple, Polygonal, Planar, Pruritic, Papules

Tx: Topical steroids

Pityriasis Rosea

Unclear idiology but associated with Human Herpes Virus

***HERALD PATCH***

One patch raised with scaling then general oval papules across trunk
**Christmas tree pattern**

Tx: None, topical steroids or antihistamines for itching

(Medcomic Pityriasis Rosea)

Psoriasis

<—– PANCE Prep Pearls has a great breakdown of the pathophysiology of psoriasis and explanations of all types of psoriasis

*Thick silver scales on the extensor surfaces*

Tx: Topical steroids 1st line

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For additional questions and explanations click below!

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