Pustular Skin Rash - Differential Diagnosis Algorithm

Pruritic / Scaly / Erythematous lesions, usually poorly demarcated

Acneiform - Erythematous papules and pustules on face:

 • Acne Vulgaris - Comedones +/- nodules, cysts, scars on face & trunk

 • Acne Rosacea - Telangiectasia, episodic flushing after sunlight, alcohol, hot or spicy food & drinks

 • Perioral Dermatitis - Perioral, periorbital & nasolabial distribution, sparing vermillion borders of lips

Infectious:

 • Folliculitis - Pustules centered around hair follicles

 • Impetigo - Pustules with overlying thick honey-yellow crusts

 • Candidiasis - "Beefy red" erythematous patches in body folds with satellite pustules at periphery



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