Palmoplantar Pustulosis
Recurring pustules on the palms and soles
Quick Facts
- Type: Chronic inflammatory skin condition
- Affected areas: Palms and soles
- Strong link: Smoking
- Course: Long-term, flares and remissions
Overview
Palmoplantar pustulosis (PPP) is a chronic skin condition in which clusters of small, pus-filled blisters (pustules) appear on the palms of the hands and the soles of the feet. The pustules are sterile, meaning they are not caused by an infection, and they tend to come and go over months and years.
PPP is considered closely related to psoriasis, and it can be uncomfortable and persistent. It is strongly associated with smoking. While there is no permanent cure, a range of treatments can reduce flares and ease symptoms, and stopping smoking often helps.
Symptoms
Symptoms are concentrated on the hands and feet and tend to follow a pattern of flares.
- Crops of small, yellowish pus-filled blisters on the palms and soles
- Blisters that dry into brown, scaly, or crusty spots
- Red, thickened, cracked, or scaly skin in the affected areas
- Itching, burning, or soreness
- Painful cracks (fissures) that can make walking or using the hands difficult
- Cycles of new pustules forming as older ones heal
The condition can be persistent and may interfere with work and daily activities that rely on the hands and feet.
Causes
The exact cause of palmoplantar pustulosis is not fully understood, but it involves an overactive immune response in the skin. Several factors are linked to it:
- Smoking: The strongest known association; most people with PPP are current or former smokers.
- Immune system activity: Inflammation drives the formation of pustules, similar to processes in psoriasis.
- Genetic tendency: A personal or family history of psoriasis or related conditions may increase risk.
- Triggers: Infections, stress, and certain medications may set off or worsen flares.
PPP is not contagious and cannot be caught from or passed to others.
Risk Factors
- Smoking, including a past history of smoking
- Adult age, with onset often in middle age
- Female sex, as the condition is reported more often in women
- A personal or family history of psoriasis
- Associated conditions such as thyroid disease in some people
Diagnosis
Diagnosis is usually based on the appearance and location of the pustules.
- Physical examination: A clinician examines the palms and soles for the typical pustules and scaling.
- Medical history: Questions about smoking, flares, and any history of psoriasis.
- Skin swab: Sometimes done to confirm the pustules are sterile and not a bacterial or fungal infection.
- Skin biopsy: Occasionally a small sample is examined if the diagnosis is unclear.
Treatment
Treatment aims to reduce flares and relieve symptoms, often using a stepwise approach.
- Topical treatments: Strong corticosteroid creams or ointments, sometimes under occlusion, and other topical medicines for the skin.
- Moisturizers: Regular emollients to soften skin and reduce painful cracking.
- Phototherapy: Controlled ultraviolet light treatment can help some people.
- Systemic medicines: For severe or stubborn disease, oral medicines that calm the immune system may be used.
- Stopping smoking: Quitting smoking is strongly encouraged and can improve the condition over time.
Because PPP is chronic, treatment usually focuses on long-term control rather than a one-time cure.
Prevention
PPP cannot always be prevented, but several steps may reduce flares and ease symptoms:
- Stop smoking, which is the single most helpful step
- Keep the skin well moisturized to limit cracking
- Avoid harsh soaps and irritants on the hands and feet
- Protect the hands and feet from injury and excessive friction
- Manage stress, which can trigger flares for some people
When to See a Doctor
See a doctor if you develop recurring pus-filled blisters or persistent scaly, cracked skin on your palms or soles. A dermatologist can confirm the diagnosis and recommend treatment, since the condition can be confused with infection or eczema.
Seek care promptly if the skin becomes very painful, deeply cracked, or shows signs of bacterial infection such as spreading redness, warmth, or pus that smells foul, or if the condition is severely limiting your ability to walk or use your hands.
Frequently Asked Questions
Is palmoplantar pustulosis an infection?
No. Although it produces pus-filled blisters, they are sterile and not caused by bacteria or fungus. It is an inflammatory skin condition closely related to psoriasis and is not contagious.
Does smoking really affect this condition?
Yes. Smoking is the strongest known link to palmoplantar pustulosis, and most people with it are current or former smokers. Quitting smoking is one of the most helpful steps and can improve the condition over time.
Is it the same as psoriasis?
It is closely related to psoriasis and is sometimes considered a form of it, but it is often treated as a distinct condition. Both involve immune-driven inflammation, and some people have features of both.
Can it be cured?
There is no permanent cure, but treatments can control flares and relieve symptoms. Topical medicines, moisturizers, light therapy, and sometimes oral medicines are used, along with stopping smoking, to keep the condition in check.
When should I see a doctor about my palms or soles?
See a doctor for recurring pus-filled blisters or persistent cracked, scaly skin on the palms or soles. Seek care promptly if the skin becomes very painful, deeply cracked, or shows signs of infection such as spreading redness or warmth.
References
- American Academy of Dermatology Association. Pustular psoriasis.
- National Psoriasis Foundation. Palmoplantar pustulosis.
- MedlinePlus, U.S. National Library of Medicine. Psoriasis.