Pustular Psoriasis: Symptoms and Treatment

Pustular psoriasis looks distinctly different from other psoriasis subtypes — and understandably alarms people the first time they see it — but understanding what's actually happening helps demystify it.

What It Looks Like

Pustular psoriasis is characterized by white or yellowish pustules — small, raised bumps filled with fluid — surrounded by red, inflamed skin. It's important to understand what these pustules actually contain: they're sterile, meaning they're not caused by bacteria or infection. The fluid inside is made up of white blood cells (specifically neutrophils) that have migrated to the skin as part of the inflammatory process — the same basic immune mechanism driving psoriasis elsewhere, just manifesting differently at the skin surface.

Two Main Forms

Localized (Palmoplantar Pustular Psoriasis)

Confined to specific areas, most commonly the palms and soles — we've covered this specific presentation in detail in our full palmoplantar psoriasis article. This form tends to be chronic and more resistant to standard treatment than plaque-type psoriasis in the same location.

Generalized (von Zumbusch Pattern)

A more severe, widespread form where pustules develop rapidly across large areas of the body, often accompanied by fever, chills, and feeling generally unwell. This form can be serious and, in severe cases, may require hospitalization for proper management — sharing some overlap in severity concerns with erythrodermic psoriasis.

What Triggers It

Generalized pustular psoriasis in particular has been linked to specific triggers: abrupt discontinuation of systemic corticosteroids, certain medications, infections, pregnancy, and in some cases, rapid withdrawal from other psoriasis treatments. This is part of why gradual, medically supervised treatment changes matter — abrupt stops can genuinely trigger this more severe presentation in susceptible individuals.

Treatment Approaches

• For localized (palmoplantar) pustular psoriasis — topical corticosteroids, sometimes combined with coal tar, alongside phototherapy or systemic treatment for more resistant cases
• For generalized pustular psoriasis — typically requires hospital-based care and systemic medications to bring the acute inflammatory process under control quickly, given the severity and potential systemic complications
• Ongoing management — biologic treatments, particularly those targeting the IL-17 and IL-23 pathways, are increasingly used for pustular psoriasis given the shared underlying immune mechanisms with other psoriasis forms

Living With Localized Pustular Psoriasis

For the more common localized (palmoplantar) form, daily management resembles other hand and foot psoriasis care — gentle cleansing, consistent moisturizing, and protecting affected skin from friction and trauma, alongside whatever medical treatment your dermatologist has prescribed. This form tends to be a chronic, ongoing condition to manage rather than something that fully resolves.

When to Seek Urgent Care

If pustules develop rapidly and widely across the body, particularly alongside fever, chills, or feeling generally unwell, this could indicate generalized pustular psoriasis and warrants prompt medical attention rather than waiting to see if it improves on its own.

Frequently Asked Questions

Are the pustules contagious or infectious?

No — despite the appearance, the pustules are sterile and represent an immune response, not a bacterial or viral infection. Pustular psoriasis is not contagious.

Is pustular psoriasis more serious than plaque psoriasis?

The localized form is generally comparable in overall seriousness to other chronic psoriasis presentations, though often harder to treat. The generalized form is more serious and can require urgent medical care.

Next Steps

For hand and foot-specific involvement, see our full palmoplantar psoriasis article.

This article is for general educational purposes and is not a substitute for professional medical advice, diagnosis, or treatment. Seek prompt medical attention for widespread or rapidly developing pustules, especially with fever.