Pustular psoriasis, which can be limited to one part of the body or can be widespread, may be the first symptom of psoriasis or develop in a patient with chronic plaque psoriasis.
There may be a red drop-like rash (guttate psoriasis) or patches of scaly skin that crack and ooze pus (pustular psoriasis).
Pustular psoriasis usually occurs in adults but can occur in children and adolescents.
Generalized pustular psoriasis is also known as Von Zumbusch pustular psoriasis.
Frost blisters are pustular swellings due to the up-growth of callus-tissue into cavities caused by the uprising of the superficial cortex under the action of intense cold.
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.
Many aphides, &c., puncture the leaves, suck out the sap, and induce va:ious local deformations, arrest of growth, pustular swellings, &c., and if numerous all the evils of defoliation may follow.