Pustular psoriasis is a rare form that can be localized in one area or spread over many regions of your body. Although pustules (small, inflamed, pus-filled raised area of the skin) are seen, they do not represent an infection and are not contagious.
A) Localized Pustular Psoriasis
One or more patches of psoriasis spontaneously develop small pustules. Irritation and aggressive over treatment may also induce this form of psoriasis. Affected areas can be painful and present lifestyle challenges as the lesions frequently appear on the palms of the hands and soles of the feet.
B) Palmoplantar Pustulosis
Palmoplantar pustulosis is a localized form of pustular psoriasis, which occurs on the palms of your hands and the soles of your feet. The condition is chronic, persistent, symmetrical and difficult to treat, and it typically affects middle-aged women. Affected areas can be painful and present lifestyle challenges as the lesions are located in high-use and/or weight-bearing areas.
Acropustulosis is a localized form of pustular psoriasis that affects fingers, thumbs and toes. Pustules appear, then burst, leaving bright red areas that may ooze, and become scaly and/or crusty. The nails often become malformed and appear crumbly, and may lift up because of the underlying lakes of pus.
D) Generalized (von Zumbusch) Pustular Psoriasis
This particular form usually indicates a worsening of the psoriasis. Affected areas become sore and red, and pin-point pustules develop that spread to involve large patches. The skin folds and groin area are commonly involved. People with this very rare type of psoriasis usually feel unwell - they may have a fever and a high white blood cell count, and in extreme cases the condition can be fatal.