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Pustular Eruptions

»	How does a pustule differ from a vesicle or bulla?
»	How are pustules classified?
»	What is the most common pustular skin eruption?
»	Name the different types of pustular psoriasis. How do they differ?
»	Do any factors precipitate generalized pustular psoriasis?
»	Is pustular psoriasis treated differently than classic plaque-type psoriasis?
»	What is pustular bacterid?
»	Why do some consider pustular bacterid a form of localized pustular psoriasis of the palms and soles?
»	What is subcorneal pustular dermatosis (Sneddon-Wilkinson disease)?
»	Discuss the pathogenesis of subcorneal pustular dermatosis.
»	How is subcorneal pustular dermatosis treated?
»	What is superficial IgA pemphigus?
»	What are the cutaneous findings in reactive arthritis (Reiter’s disease)?
»	Which drugs are commonly associated with pustular drug eruptions?
»	What is acne necrotica miliaris?
»	What is folliculitis decalvans?
»	Discuss the pathogenesis of miliaria pustulosa.
»	How is miliaria pustulosa treated?
»	What is the differential diagnosis of a pustular eruption in a neonate?
»	How do erythema toxicum neonatorum and transient neonatal pustular melanosis differ?
»	What is infantile acropustulosis?
»	What causes infantile acropustulosis?
»	What is the best treatment of infantile acropustulosis?

How does a pustule differ from a vesicle or bulla?

A pustule is a purulent vesicle or bulla. Whereas a vesicle contains clear or translucent fluid, a pustule is filled with neutrophils or, less commonly, eosinophils. Pustules are one of the primary lesions in skin. Most pustular eruptions begin as pustules, but others may pass through a transitory stage in which they appear vesicular (vesiculopustules).