When the true skin is inflamed various appearances may arise, according to the intensity and extent of the inflammation, and the eruption may be papular, vesicular, pustular, tubercular, bulbous or ulcerative.
There is a class of gall-like or pustular outgrowths for which no external cause has as yet been determined, and which are therefore often ascribed to internal causes of disease.
Streptococcus tends to manifest itself with skin erosions and pustular lesions.
Conjunctivitis and a partially generalized pustular eruption followed handling vanilla pods (Hiley 1909).
Primarily a pustular rash may also be seen in those taking corticosteroids, lithium, oral contraceptives and anticonvulsant therapies.