Palmoplantar pustulosis is a chronic inflammatory skin condition that causes recurring crops of pus-filled bumps, called pustules, on the palms of the hands, soles of the feet, or both. Although the bumps can look infected, the pustules are typically sterile rather than caused by ordinary bacterial infection.
Because similar-looking rashes can come from eczema, fungal infection, contact dermatitis, psoriasis, and other conditions, an accurate diagnosis matters. A dermatologist can examine the pattern, symptoms, and medical history and decide whether testing is needed.
Quick answer
- Palmoplantar pustulosis causes recurring sterile pustules on the palms and soles.
- The affected skin may also become red, scaly, thickened, cracked, itchy, or painful.
- Smoking, friction, repetitive trauma, irritants, and certain other factors can be associated with flares.
- The condition can be persistent and may require prescription treatment.
- A dermatologist can distinguish it from infections and other conditions that can look similar.
What is palmoplantar pustulosis?
Palmoplantar pustulosis, often shortened to PPP, is a chronic and frequently relapsing inflammatory disorder that primarily affects the palms and soles. It is sometimes discussed as a form of localized pustular psoriasis, although experts continue to study how closely it overlaps with other forms of psoriasis.
The pustules often appear in crops. As they dry, they may leave yellow-brown or reddish-brown spots behind. The surrounding skin can become red, scaly, thickened, or cracked. Some people experience significant burning, tenderness, itching, or painful fissures, especially on weight-bearing areas of the feet.
Why do the bumps contain pus if they are not infected?
The word “pustule” describes a small bump containing inflammatory material. In palmoplantar pustulosis, these pustules are generally considered sterile, meaning they are not usually caused by the type of bacterial infection people commonly associate with pus.
This distinction is important because repeatedly treating an inflammatory condition as an infection may not address the underlying problem. At the same time, cracked or damaged skin can occasionally develop a secondary infection, so new drainage, spreading redness, warmth, worsening pain, or other concerning changes deserve medical attention.
Common causes and triggers
The exact cause of palmoplantar pustulosis is not fully understood. It appears to involve abnormal inflammation in the skin, and several environmental or health-related factors may contribute to its development or aggravation.
- Smoking: Current or previous cigarette smoking has a strong association with palmoplantar pustulosis, and smoking may aggravate the condition.
- Friction and repetitive trauma: Repeated pressure or mechanical irritation of the palms and soles may worsen affected areas.
- Skin irritants: Frequent exposure to irritating substances may contribute to inflammation in susceptible skin.
- Stress: Some people notice that periods of stress coincide with worsening symptoms.
- Certain medications: Some medications have been associated with pustular skin reactions, making a medication review useful when symptoms begin unexpectedly.
- Other inflammatory conditions: Some people with palmoplantar pustulosis also have plaque psoriasis or psoriatic arthritis, although this is not true for everyone.
What can palmoplantar pustulosis feel like?
The appearance can be striking, but discomfort is often what interferes most with daily life. Pustules and inflamed skin on the hands can make gripping, typing, cooking, or working with tools uncomfortable. On the soles, fissures and tenderness can make walking or standing difficult.
Symptoms may include burning, itching, tenderness, scaling, peeling, cracking, or thickened skin. The condition commonly follows a relapsing pattern, with periods of increased activity followed by partial improvement.
What can you do at home?
Home care cannot replace a diagnosis or prescription treatment, but gentle skin care may help reduce additional irritation while you arrange an evaluation.
- Use gentle, fragrance-free cleansers instead of harsh soaps when possible.
- Moisturize regularly to support the skin barrier and reduce excessive dryness.
- Choose comfortable footwear that reduces friction and pressure on affected soles.
- Protect the hands from repetitive irritation, detergents, and harsh chemicals when practical.
- Avoid picking, squeezing, or intentionally opening pustules.
- If you smoke, discussing smoking cessation with your health care professional may be worthwhile because smoking is strongly associated with this condition.
If a product causes burning, worsening redness, or irritation, stop using it and discuss the reaction with your dermatologist.
How a dermatologist may evaluate recurrent pustules
Palmoplantar pustulosis is often diagnosed through a clinical examination, but other conditions can resemble it. Depending on the presentation, a dermatologist may consider tests that help rule out fungal infection, bacterial infection, allergic contact dermatitis, eczema, or other inflammatory disorders.
In some cases, testing can include skin scrapings, cultures, swabs, patch testing, or a skin biopsy. These tests are not necessary for every patient, but they may be helpful when the diagnosis is uncertain, the presentation is unusual, or the rash is not responding as expected.
Professional treatment options
Treatment depends on the severity, location, symptoms, medical history, and previous response to therapy. Because thick skin on the palms and soles can make treatment challenging, management often needs to be individualized.
Common medical approaches may include prescription topical anti-inflammatory medications, phototherapy, or systemic medications for more persistent disease. Dermatologists may also consider therapies used for certain forms of psoriasis or other inflammatory skin disorders when appropriate. Response varies, and there is no single approach that is appropriate for every person.
A dermatologist can also review medications, possible triggers, occupational exposures, smoking history, and other health conditions that might influence the treatment plan.
When to see a dermatologist
Consider scheduling a dermatology evaluation when pustules repeatedly return on the palms or soles, especially when they cause cracking, pain, burning, difficulty walking, or problems using your hands.
Prompt medical attention is particularly important if you develop rapidly spreading redness, marked swelling, increasing warmth, significant drainage, fever, severe pain, or other signs that could suggest a secondary infection or another condition requiring evaluation.
Frequently asked questions
Is palmoplantar pustulosis contagious?
Palmoplantar pustulosis itself is an inflammatory disorder and is not generally considered contagious. However, fungal or bacterial conditions can sometimes resemble it, which is one reason an accurate diagnosis is important.
Is palmoplantar pustulosis the same as psoriasis?
The relationship is complex. Palmoplantar pustulosis is often grouped with pustular psoriasis, but some experts consider it a distinct inflammatory condition. Some people with PPP also have other forms of psoriasis, while others do not.
Why does palmoplantar pustulosis keep coming back?
PPP commonly follows a chronic, relapsing course. The underlying inflammatory tendency can persist even after the skin improves, and triggers such as smoking, friction, irritation, or other factors may contribute to recurring flares.
Can palmoplantar pustulosis be mistaken for athlete’s foot?
Yes. Vesicular or inflammatory fungal infections of the feet can resemble PPP in some cases. A dermatologist may use skin scrapings or fungal testing when the appearance is uncertain.
Should I pop the pustules?
It is generally better not to squeeze or intentionally open them. Manipulating inflamed skin can increase irritation, disrupt the skin barrier, and potentially increase the risk of secondary infection.
Can a dermatologist help if previous treatments have not worked?
Yes. Persistent disease may require confirming the diagnosis, identifying aggravating factors, reviewing previous treatments, and considering different topical, light-based, or systemic approaches. Your clinician can help you decide which options are reasonable for your situation.
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This article is for educational purposes and is not medical advice. For diagnosis and personalized treatment, please book an appointment with a board-certified dermatologist.
