Generalized pustular psoriasis (GPP) is a rare but serious type of psoriasis. Your skin may get red, painful, and covered with pus-filled bumps called pustules. You may also feel sick all over. In some cases, you may need hospital care.
If you've had a GPP flare before, it makes sense to worry about the next one. A flare plan can help you act before symptoms spiral. Your doctor can help you learn early warning signs, who to call, and how fast to get treatment when you feel an episode coming on.
"The difference of hours can be important clinically in terms of how much skin is involved and the risk of complications," says Jeffrey M. Cohen, MD, MPH, a Yale Medicine dermatologist and director of the Psoriasis Treatment Program at Yale School of Medicine.
For some people, early or ongoing treatment may help prevent an emergency room visit or hospital stay.
Here's how to work with your doctor to build a GPP treatment plan.
What's the Goal of GPP Treatment?
GPP treatment has two main goals: get you through a flare safely and help lower the chance of another one.
During a flare, speed matters. Your doctor will want to calm inflammation fast. When large areas of skin are inflamed, your skin barrier may not hold in fluids or keep germs out as well as it should.
That can raise your odds of infection, dehydration, and changes in electrolytes. These are minerals your body needs to keep your heart, muscles, and nerves working. In rare cases, a severe flare can become life-threatening if not treated quickly.
Short-term treatment may aim to:
- Stop new pustules from forming
- Ease redness, swelling, and skin pain
- Bring fever, chills, heart rate, and other vitals under control
- Prevent infection and other complications (like heart, kidney, or lung issues)
Between flares, the goal is prevention and planning. Once your skin calms down, you and your doctor can review what happened and whether ongoing treatment might lower your risk of another flare or help with symptoms between flares. Follow-up care is important, even after your skin clears.
"Even if you've had only one flare, you really should remain under the care of a dermatologist," Cohen says. "So that if a GPP flare appears to be happening again, someone can step in to help quickly."
Spesolimab (Spevigo): The First GPP-Specific Treatment
GPP isn't just plaque psoriasis that spreads. It has its own immune pattern.
One key pathway involves interleukin-36, or IL-36. Think of IL-36 as part of your skin's alarm system. When you have an injury or infection, it helps call immune cells to the area so your body can protect and repair the skin.
In GPP, that alarm can get too loud or stay on too long. Inflammation builds and spreads. That's part of what leads to the redness, pain, swelling, and pustules of a flare.
Spesolimab (Spevigo) is the first drug approved specifically for GPP. It's a biologic medication that blocks the IL-36 pathway, which helps calm the overactive immune response linked to flares.
"It has a unique mechanism of action that none of the other currently approved psoriasis medications have," Cohen says.
Here's how your doctor may use it:
During a flare. Spesolimab is given through a vein as an IV infusion, often in a hospital or other medical setting. It can treat an active GPP flare in adults and children ages 12 and older who weigh at least 88 pounds.
Treatment usually includes one IV dose given over 90 minutes. If symptoms continue, your doctor may give you a second dose one week later.
Between flares. Spesolimab can also be given as a shot under the skin. Treatment starts with a larger first dose, then continues every four weeks.
Your doctor may consider this option if:
- You've had repeat flares.
- Your flares have been severe.
- You're at high risk of another episode.
Many people or caregivers can learn to give the shot at home after training.
Other Treatments for GPP
Spesolimab is approved specifically for GPP, but it may not be the right or only choice for everyone.
Your doctor may use other treatments based on:
- How severe your flare is
- How fast symptoms are moving
- If you have other health conditions
- Your odds of future flares
Access to specialty medications can be a hurdle, too.
Spesolimab may not be available right away because of insurance, approval steps, or supply issues, "because many hospitals, even large hospitals, don't keep it on hand," Cohen says.
If getting spesolimab would take time, your doctor may use other medications to manage your flare, such as:
Biologics used for psoriasis. Doctors sometimes use biologics that target IL-17, IL-23, or TNF-alpha. These drugs may help some people with GPP, especially if you also have plaque psoriasis or another inflammatory immune condition.
Cyclosporine or methotrexate. These older drugs calm the immune system in a broader way. Cyclosporine may work more quickly for some people. Methotrexate is often used more for longer-term control. Both can have side effects, so your doctor may check your bloodwork during treatment.
Oral retinoids, such as acitretin. This drug is made from vitamin A. It works throughout the body to help calm inflammation. In GPP, it may lower some of the immune signals that drive flares. Your doctor may combine acitretin with other medications, like biologics.
Corticosteroids. Topical steroids may help ease redness, swelling, and other skin symptoms. In serious cases, you may get oral steroids for a short time. But stopping these drugs suddenly can trigger a GPP flare. Your doctor will help you lower the dose slowly and safely.
Apremilast. This is an oral medication that helps lower some of the immune signals that drive inflammation. Your doctor may suggest it if you're in between flares and other drugs stop working or aren't safe for you.
Light therapy. Phototherapy uses controlled ultraviolet light to lessen inflammation in the skin. It's not used to treat a severe, active GPP flare. But your doctor may use it between flares to help manage ongoing psoriasis symptoms.
Make a GPP Flare Plan Before You Need It
During a severe GPP flare, you may feel sick, scared, or too overwhelmed to think through next steps. That's why it helps to make a flare plan while you're well.
Use this checklist to help you prepare.
Learn your early warning signs. GPP can look different from person to person. Some people may notice symptoms hours or days before a flare gets worse. Others may feel like symptoms come on fast.
Possible warning signs may include:
- Mild redness or skin color changes
- Itching, burning, or skin tenderness
- New, small pustules
- Fatigue or joint pain
- Feeling like you're coming down with something
Cohen says it's often easier to spot an early GPP flare if you've had one before. Think back to what your body did last time. If those same symptoms start to show up again, call your dermatologist right away.
Know who to call. Ask your doctor what to do at the first sign of symptoms.
Your plan should answer:
- When should I call my dermatologist?
- What symptoms mean I should go to the ER?
- Who should I call if my dermatologist isn't available?
- Which hospital or clinic is most likely to have dermatology support?
- How can I tell the ER team that I have GPP?
Keep these phone numbers in one easy-to-find place:
- Your dermatologist
- A backup doctor, nurse, or on-call number
- Your pharmacy
- Your preferred urgent care clinic or ER
- A friend or family member who can help you get care
Call your dermatologist early if you think a flare is starting. But if the rash is spreading fast or you have a fever, chills, severe joint pain, or weakness, you may need emergency care.
Ask how you'll get flare treatment. Some GPP treatments work best when started early. Ask your doctor what they would suggest during a flare and where you should go to get it.
Questions to ask include:
- What treatment would you recommend for an active flare?
- Would I need an IV infusion, injection, pill, or hospital care?
- Where would I go to get treatment quickly?
- Does my local hospital keep GPP treatment on hand?
- What should I do if the medication isn't available right away?
This matters because any treatment may take time to get approved. Planning ahead may help your care team avoid delays.
Know your possible triggers. Keep in mind that some people flare for no clear reason, and it's never your fault if symptoms come back. "No one should be blaming themselves for a generalized pustular psoriasis flare," Cohen says. "That's just not how this goes."
Still, it may help to track what happens before a flare.
Possible triggers may include:
- Infections or other illnesses
- Medication changes
- Stopping corticosteroids too quickly
- Emotional stress
- Hormonal changes, like those that happen during pregnancy or menstrual cycles
- Low calcium levels
After each flare, write down what was going on in the days or weeks before symptoms started. If you see a pattern, tell your doctor.
Keep up with your overall health. Psoriasis is linked to higher odds of heart and metabolic health problems, and those issues may affect your treatment choices and overall health.
Ask your regular doctor how often to check for:
- High blood pressure
- Heart disease
- High cholesterol
- Type 2 diabetes
- Other inflammatory conditions
Make sure every doctor you see knows you have GPP. And tell your dermatologist before you start, stop, or change any medication, especially steroids or drugs that affect the immune system.
When to Seek Urgent Care
Call your dermatologist right away if you think a flare is starting. But don't wait for a call back if you feel very sick or symptoms are spreading fast.
Get urgent care or go to the ER if you have:
- Widespread redness, pain, or pustules
- Fever, chills, or signs of infection
- Dizziness, extreme thirst, or signs of dehydration
- Severe pain, weakness, or confusion
- A rash that's getting worse quickly
You may not be able to prevent every GPP flare. But having a plan and getting care early can help calm inflammation, lower your risk of serious problems, and help you recover faster.
Show Sources
Photo Credit: Goodshoot/Getty Images
SOURCES:
Jeffrey M. Cohen, MD, MPH, associate professor of dermatology and biomedical informatics and data science; director, Psoriasis Treatment Program, Yale School of Medicine, New Haven, Connecticut.
American Academy of Dermatology: "Pustular Psoriasis: Treatment."
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British Journal of Dermatology: "Global Delphi consensus on treatment goals for generalized pustular psoriasis."
Spevigo: "Prescribing Information: Spevigo (spesolimab-sbzo) injection, for subcutaneous or intravenous use."
JAAD Case Reports: "Generalized pustular psoriasis treated with apremilast in a patient with multiple medical comorbidities."
Biologics: "Infliximab in Combination with Low-Dose Acitretin in Generalized Pustular Psoriasis: A Report of Two Cases and Review of the Literature."
Journal of Psoriasis and Psoriatic Arthritis: "Management of Chronic Generalized Pustular Psoriasis: A review and Expert Opinion."
National Psoriasis Foundation: "Generalized Pustular Psoriasis."
American Journal of Clinical Dermatology: "Treatment Options and Goals for Patients with Generalized Pustular Psoriasis," "Impact of Generalized Pustular Psoriasis from the Perspective of People Living with the Condition: Results of an Online Survey."
Clinical, Cosmetic and Investigational Dermatology: "Exploring the Quality-of-Life Impact, Disease Burden, and Management Challenges of GPP: The Provider and Patient Perspective [Podcast]."
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