Early Recognition of Generalized Pustular Psoriasis Critical to Reducing Complications

Generalized pustular psoriasis (GPP) should be recognized as a systemic autoinflammatory disease distinct from plaque psoriasis, with early diagnosis and treatment critical to reducing flare severity and complications, according to Henry Yu, PA-C.

During his session, “Introduction to GPP: Epidemiology, Disease Burden, Diagnosis, and Clinical Features,” presented at the Masterclasses in Dermatology NP/PA Institute, Yu highlighted the IL-36 cytokine axis as a key driver of GPP and emphasized that its burden extends beyond cutaneous manifestations to physical function, psychological well-being, and social participation.

Clinically, GPP is characterized by sterile pustules developing on diffuse erythematous skin rather than established psoriatic plaques. “Think GPP when pustules are NOT on plaques,” Yu advised. Systemic manifestations, including fever, chills, malaise, and leukocytosis, should raise additional concern because patients can deteriorate rapidly and may require hospitalization.

Yu recommended using ERASPEN criteria to support diagnosis, including primary sterile pustules on nonacral skin and the absence of features suggesting another pustular disorder. Pustule cultures can confirm sterility, while biopsy may help when the diagnosis remains uncertain.

Differentiating GPP from acute generalized exanthematous pustulosis (AGEP) is particularly important. AGEP is drug-induced, typically resolves within days after withdrawal of the causative medication, and rarely recurs, whereas GPP is chronic and recurrent.

Clinicians should also assess potential triggers. Abrupt systemic corticosteroid withdrawal is a common, preventable trigger, making a comprehensive medication history important even when corticosteroids were prescribed for unrelated conditions.

“When in doubt, refer—but don’t wait to treat,” Yu emphasized. Patients with suspected GPP and systemic illness should receive supportive care and urgent dermatology or emergency consultation without waiting for biopsy results.

For clinicians, recognizing the combination of pustular disease and systemic inflammation can facilitate earlier diagnosis, appropriate stabilization, and timely treatment while reducing risks associated with delayed or incorrect management.

Reference
Yu H. Introduction to GPP: epidemiology, disease burden, diagnosis, and clinical feature. Presented at: Masterclasses in Dermatology NP/PA Institute; October 17–18, 2026; Dallas, TX.