Pustular psoriasis is a type of psoriasis that causes pustules on the skin, according to BootsWebMD. It is a rare type of psoriasis, and it has three subtypes.
Generalized pustular psoriasis, or von Zumbusch psoriasis, causes pustules to appear quickly over a wide region of skin, states BootsWebMD. The pustules may come in cycles. Other symptoms can occur with generalized pustular psoriasis, including fever, fatigue and weight loss.
Palmoplantar pustular psoriasis causes pustules to appear on the soles of the feet and palms, explains BootsWebMD. The pustules subsequently turn into brown, circular spots and peel off. They may reappear at intervals. Acropustulosis causes pustules to show up on the fingers and toes. The pustules burst and leave red, scaly areas.
Potential causes of pustular psoriasis include cholestatic jaundice, medicines, systemic steroid use and discontinuation, hypocalcemia, and irritating topical solutions. The condition also associates strongly with smoking. Skin changes that occur before, during or after a pustular psoriasis episode can be similar to those that occur in regular psoriasis, states BootsWebMD.
Pustular psoriasis is not contagious, and the pustules are not infected, reports BootsWebMD. The condition occurs equally in men and women. Patients with the condition have an average age of 50.