Condition	Distinguishing features*	Treatment
Eczema	Excoriations and lichenification of skin, often on flexor surfaces	Topical steroids and emollients
Lichen simplex chronicus	One or more plaques with lichenification in an area that is easily scratched	Potent topical steroids; help patient avoid scratching and picking at skin
Pityriasis rosea	Herald patch preceding annular plaques with collarette scale	Reassurance (self-limited condition)
Prurigo nodularis	Pruritic nodules, often on the extremities	Potent topical steroids, oral antipruritic medications, help patient avoid scratching and picking at skin
Psoriasis	Plaques with thick scale on extensor surfaces	Potent topical steroids, topical vitamin D, other treatments