Pustular psoriasis is a rare form of psoriasis characterized by painful red skin with white, pus-filled bumps called pustules. These pustules are sterile, meaning they are germ-free and not caused by an infection. Instead, they result from an overactive immune response to injury, increasing white blood cells in the skin Show Full Answer

Pustular psoriasis is a rare form of psoriasis characterized by painful red skin with white, pus-filled bumps called pustules. These pustules are sterile, meaning they are germ-free and not caused by an infection. Instead, they result from an overactive immune response to injury, increasing white blood cells in the skin. Pustular psoriasis can be localized or generalized and is more common in Asian populations. It can occur at any age, with symptoms often beginning in infancy or middle age.

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