Vesicular palmoplantar eczema is a term used to describe a group of diseases characterized by a pruritic vesiculobullous eruption involving mainly the hands and feet. Clinical presentations range from acute dermatitis to more chronic relapsing and remitting disease patterns. The diversity of presentation has created challenges in classifying hand eczema. In an effort to meet these challenges, one publication assembled an algorithm for chronic hand eczema that was based on etiology, morphology and clinical features.[1]
Although considerable overlap exists in the various forms of vesicular palmoplantar eczema, the disease can be roughly divided into the following four distinct categories[2] :
Pompholyx (Greek for "blister" or "bubble") may be further subdivided into vesicular and bullous forms, in which patients present with acute severe eruptions of blisters over their palms and, less commonly, the soles.
Chronic vesiculosquamous eczema, also called dyshidrotic eczema, was initially thought to be caused by abnormal functioning of the sweat glands. This association has since been disproved, but the term dyshidrotic eczema is still used. Patients with this variant present with small (1-2 mm) vesicles on nonerythematous skin involving the inner sides of the fingers or on the palms and soles. The vesicles are pruritic, last 1-2 weeks, desquamate, and then recur at unpredictable intervals.[2]
The chronic hyperkeratotic variety involves mainly the central palms, where it causes thickening and fissures. This category is notoriously the most difficult to treat.[2]
An id reaction refers to a widespread eczematous eruption in response to a distal focus of infection. Common manifestations include a papulovesicular eruption with vesicles on the hands and feet secondary to a fungal infection (dermatophytid).[2]
Despite the wide range of clinical presentations, all four types of vesicular palmoplantar eczema are histologically characterized by features of dermatitis, such as spongiosis and exocytosis.
Vesicular palmoplantar eczema is often thought to have an unidentified intrinsic cause. Although many etiologic factors are described, the underlying pathology of vesicular palmoplantar eczema is unknown. One study examined the roles of aquaporin 3 and aquaporin 10, which are water/glycerol channel proteins located in the epidermis, and concluded that overexpression of these channels may play a role.[3]
Similarly, although certain triggers have been associated with the development or worsening of symptoms such as atopy, contact allergy, and psychological stress, how these triggers cause flares has not been elucidated.[2]
Vesicular palmoplantar eczema results in histologic evidence of dermatitis, such as spongiosis, which is often accompanied by lymphocytic infiltrates.
The etiology of hand eczema is unknown, but most observers suggest that intrinsic changes in the skin are responsible for vesicular palmoplantar eczema. A 2012 study of an autosomal dominant form of pompholyx found a genetic linkage on chromosome 18.[4] Whether other forms have a similar genetic linkage is not clear. However, several exogenous factors have been implicated in the causation or worsening of vesicular palmoplantar eczema.
Coexisting atopy is common in patients with palmoplantar eczema. A study found a strong association between pompholyx and atopic status.[5] However, this is by no means the only causal relationship, because many patients have no history of atopy. In a univariate analysis, personal and family history of atopy, history of eczema, hyperhidrosis, and tinea pedis were the main factors associated with pompholyx cases.[6]
Emotional stress may also trigger episodes.
Seasonal changes seem to be directly related to relapses, in that episodes are most common in the spring and summer months. Warm weather has been known to initiate episodes, with several cases of photoinduced pompholyx reported. Although dysfunction of the sweat glands is no longer accepted as the cause of dyshidrotic eczema, increased sweating seems to exacerbate the condition, and many patients with palmar hyperhidrosis also have coexisting dyshidrotic eczema. Hyperhidrosis can be an aggravating factor in as many as 40% of patients with pompholyx eczema.[7]
Photosensitivity to ultraviolet (UV) A (UVA) has been reported as an etiologic factor in a small subset of patients with eczema.[8] This suggests that the worsening of the disease in summer months may be due to the increase in exposure to sunlight. On the other hand, UVA therapy is a widely accepted form of treatment for palmoplantar eczema.[9]
Sensitivity to certain metals, particularly nickel and cobalt, has been linked to vesicular palmoplantar eczema.It has been suggested that low zinc levels may play a role. A 2016 prospective case-noncase study examining serum levels of cadmium and zinc noted a significant decrease in zinc levels in cases of vesicular palmoplantar eczema as compared with the noncase group. The exact role of zinc in the pathogenesis of vesicular palmoplantar eczema remains unknown but may be related to the impact of deficient states on inflammation.[10]
Exogenous factors causing allergic contact pompholyx include balsams and cosmetic and hygiene products.[11]
A 2013 study showed an increase in immunoglobulin E (IgE) levels and vesicular palmar eczema after house dust mite exposure.[12]
Drugs responsible for inducing episodes include oral contraceptive pills and aspirin.
Palmoplantar eczema occurring after intravenous immunoglobulin (IVIG) therapy has been reported.[13] A review of eczematous reactions linked with IVIG therapy cited pompholyx as occurring in 63.5% of the cases reported having an eczematous reaction.[9] Although most cases are seen in adults,[14] there have been occurrences in the pediatric population after IVIG administration for Kawasaki syndrome.[15]
The onset of palmoplantar eczema typically occurs within a few days of the first treatment and can recur when rechallenged. The mechanism of pompholyx induction is unknown but may be related to the dose, infusion rate, type of IVIG, and even possibly the underlying disease being treated.[16] The majority of IVIG-associated cases of vesicular eczema are observed in patients with neurologic disorders, including multiple sclerosis, Guillain-Barré syndrome, amyotrophic lateral sclerosis, motor neuron disease, and chronic inflammatory demyelinating polyradiculoneuropathy.[15]
Case reports have described palmoplantar pompholyx secondary to secukinumab therapy for psoriasis.[17, 18]
Fungal infections, particularly tinea pedis caused by Trichophyton rubrum, are most commonly implicated in id reactions. Bacterial infections play a role in both causation and in secondarily infecting lesions.
Cigarette smoking has been suggested as a pathogenetic factor in palmar eczema[19] and may also reduce the efficacy of topical therapy with psoralen and UVA (PUVA).[20]
HIV infection has been associated with pompholyx, with response to antiretroviral therapy; conversely, one case report described two HIV-positive patients who developed severe dyshidrotic eczema after starting antiretroviral treatment, probably as a consequence of an immune reconstitution inflammatory syndrome.[21, 22]
The frequency of vesicular palmoplantar eczema in the United States is unknown.
The worldwide incidence is also unknown, but vesicular palmoplantar eczema is probably responsible for 5-20% of all cases of eczema of the hand. The dyshidrotic pattern is most common.[23] A 2012 study found that pompholyx accounted for 14% of all cases of hand eczema.[5]
Pompholyx most commonly occurs in patients aged 20-40 years, but it may occur in individuals of any age. Onset in patients younger than 10 years is unusual. The frequency of recurrent episodes of pompholyx decreases after middle age, though this is not true of the chronic vesicular and hyperkeratotic variants.
The male-to-female ratio for vesicular palmoplantar eczema is 1:1.
For mild cases of palmoplantar eczema, the prognosis is excellent. The more severe chronic hyperkeratotic variety of vesicular palmoplantar eczema (eczema tyloticum) often requires lifelong treatment and results in considerable disability.
Acute vesicular eczema (pompholyx) in both major and minor forms tends to occur intermittently or sporadically and becomes less common as patients age. Episodes are less frequent from middle age onward.[2]
For subacute and chronic forms of vesicular and hyperkeratotic eczema, which often persist for years, the prognosis is less satisfactory than it is for other forms.
For patient education resources, visit the Skin Conditions and Beauty Center. Also see the patient education article Eczema (Atopic Dermatitis).
The severity of vesicular palmoplantar eczema symptoms varies, ranging from mild discomfort to acute severe episodes. Patients rarely require hospitalization.
Classically, the eruption of vesicles is preceded by itching, burning, and prickling sensations in the palms and soles. Thereafter, small (1- to 2-mm) vesicles form, most commonly on the lateral sides of the fingers. In pompholyx, the central areas of the palms and soles may or may not be involved. Large vesicles can also develop and may coalesce to form confluent bullae. The lesions last for 2-3 weeks, after which spontaneous resolution generally occurs. Occasionally, large bullae may have to be aspirated. This phase is followed by desquamation.
Chronic forms typically recur, and episodes are more frequent during the spring and summer than in the fall and winter.
Clinical signs depend on the stage and form of palmoplantar eczema.
Acute episodes of vesicular eczema are characterized by a sudden onset of small, clear vesicles or bullae that are said to be "sago grain‒like" or "tapiocalike" in appearance (see the image below). Vesicles and/or bullae are accompanied by severe, occasionally painful pruritus. Small vesicles may enlarge or become more confluent and present as large bullae (especially on the palms and soles). Vesicles and bullae subsequently dry out and resolve, usually without rupturing.
![]() View Image | Pompholyx of the palms. |
In most individuals, desquamation occurs 2-3 weeks after the onset of vesicles and bullae. In some patients, a milder recurrence follows the initial severe episode. Secondary infections (eg, impetigo, cellulitis, or lymphangitis) are possible in patients with recurrent hand eczema. Secondary nail changes (eg, dystrophic nails, irregular transverse ridging, pitting, thickening, discoloration) can also occur.
Subacute vesicular eczema tends to have a chronic relapsing course, with more vesiculation and more erythema in the acute phases than in later phases. Residual erythema or some dryness or scaling occurs in the less active phases. Fissures are common and painful sequelae.
The chronic hyperkeratotic variety results in severe itching accompanied by thickening and fissuring of the palm. This effect may decrease the mobility of the affected hand.
When id reactions occur on the hands, they typically involve the fingers and the palms. These reactions often resolve when the primary infection is treated.
Potential complications of vesicular palmoplantar eczema include secondary bacterial infections can occur, such as cellulitis, lymphedema, and, more rarely, bloodstream infection (BSI).[24]
The diagnosis of palmoplantar eczema is essentially a clinical one; however, studies may be helpful in excluding other disorders. The following may be considered:
A 2023 S2k guideline from a group of German medical societies made recommendations for the diagnosis of hand eczema (HE), including the following[27] :
There are no laboratory studies specific to vesicular palmoplantar eczema. However, immunoglobulin E (IgE) levels may be elevated in patients with atopic dermatitis.[2]
Histologic features of vesicular palmoplantar eczema vary according to the stage of evolution of the disease. Usually, evidence suggests intracellular edema or spongiosis, lymphocytic infiltration of the epidermis, and intraepidermal vesicles or bullae in acutely affected persons. In chronically affected persons, spongiosis is present and often associated with epithelial proliferation and/or hyperkeratosis or psoriasiform epidermal hyperplasia. Dermis is often edematous, with a mixed perivascular inflammatory cell infiltrate.
Distinguishing between palmoplantar pustulosis and pompholyx can be challenging because the two conditions have similar histologic features. Studies aimed at differentiating the two entities have found thinning of rete ridges, foci of parakeratosis, and irregular epidermal hyperplasia to be more often associated with pompholyx.[28] A comparison of inflammatory mediator expression between pompholyx and palmoplantar pustulosis found that mRNA expression of granzyme B was increased in pompholyx, whereas expression of interleukin (IL)-8, and IL-17α was increased in palmoplantar pustulosis.[29] These may serve as immunologic markers in distinguishing palmoplantar pustulosis from pompholyx.
Several modalities of therapy are available for the treatment and control of vesicular palmoplantar eczema. The dyshidrotic eczema severity index (DASI), a standardized severity scale for palmoplantar eczema, has made it easier to compare the efficacy of various therapies in controlled clinical trials.[30]
Therapy should be chosen according to the type and severity of the condition. Whenever possible, eliminate known triggers. If pruritus is a problem, antihistamines (eg. hydroxyzine) can relieve some symptoms.
A 2023 S2k guideline from a group of German medical societies made recommendations for the treatment of hand eczema (HE), including the following[27] :
First-line topical therapy for vesicular palmoplantar eczema includes high-potency glucocorticoids; second-line therapeutic options include topical calcineurin inhibitors, adjunctive keratolytics, calcipotriene, retinoids, and various combinations thereof.[2]
Topical high-potency glucocorticoids (eg, betamethasone dipropionate and clobetasol propionate) are the agents of choice. Ointment preparations are less irritating and can enhance drug delivery. Application of these medications under plastic and vinyl occlusion enhances their efficacy. However, this method may predispose the patient to secondary infection and to both local and systemic adverse effects of corticosteroids; therefore, it should be used only intermittently and never in the presence of coexisting infection.
Mild vesicular palmoplantar eczema may be controlled with the use of less potent corticosteroids (eg, betamethasone valerate, triamcinolone, or mometasone cream or ointment).
In the hyperkeratotic form of hand eczema, topical keratolytic agents such as salicylic acid and tar agents may be useful adjunctive therapies.
Acute, severe episodes of pompholyx benefit from rest, bland applications of wet soaks and compresses, and drying agents such as Burow solution. Occasionally, large blisters may have to be aspirated.
Topical calcineurin inhibitors (eg, topical tacrolimus 0.1% ointment and pimecrolimus) have been shown to be as effective as mometasone furoate in treating chronic relapsing eczema of the hands.[31] They may be used as steroid-sparing agents to treat resistant palmar eczema, with minimal systemic absorption or systemic effect.[32] When plantar eczema is being treated, other agents should be considered, because calcineurin inhibitor therapy is less effective on the soles of the feet than on the hands. The use of occlusion has also been shown to increase the efficacy of these agents.
A small open-label study demonstrated the efficacy of topical vitamin D3 derivatives (ie, calcipotriol and maxacalcitol) for the control of hyperkeratotic palmoplantar eczema.[33]
Systemic therapy for vesicular palmoplantar eczema includes steroids, immunosuppressive agents (eg, azathioprine[34] and cyclosporine), retinoids (eg, acitretin and alitretinoin), and psoralen plus ultraviolet (UV) A (PUVA).
Systemic glucocorticoids or intralesional steroids may be considered in acute episodes of vesicular palmoplantar eczema when local therapy fails. These agents are not helpful for long-term treatment, because of their potential for severe adverse effects.
Cyclosporine, mycophenolate mofetil, and methotrexate either alone or in combination with steroids may be used for severe, recalcitrant cases of vesicular palmoplantar eczema.[35, 36] They have also been tried as steroid-sparing agents in chronic relapsing eczema.
For hyperkeratotic eczema, aromatic retinoids (eg, acitretin), which help control hyperkeratosis, may be considered. These agents are best used in relatively low doses because of their adverse effects. Therapy may have to be continued indefinitely and is often accompanied by topical occlusive therapy with combined or alternating steroids and keratolytics (5-20% salicylic acid) or tar preparations.
Increasingly, the retinoid alitretinoin has been shown to be an effective and well-tolerated therapy for severe hand eczema.[37, 38] In a multicenter randomized controlled trial (RCT) examining severe chronic hand eczema, it was found to be superior to placebo, with 48% of patients achieving full or almost full resolution of signs and symptoms.[39] A 2012 observational study noted alitretinoin improved vesicular eczema in 47.9% of patients.[40]
An open-label study showed significant improvement with alitretinoin in dosages starting at 10 mg/day (increased to 30 mg/day as tolerated).[41] A later chart review showed alitretinoin to be a safe and tolerated medication in real-world practice for chronic hand dermatitis, which included hyperkeratotic and dyshidrotic hand eczema.[42]
In a case study, the use of etanercept yielded a 4-month remission of vesicular palmoplantar eczema, which was followed by relapse.[43]
Dupilumab, a monoclonal antibody used in the treatment moderate-to-severe atopic dermatitis, has shown positive results in case reports for dyshidrosis as well as hand dermatitis.[44, 45, 46, 47, 48] A 2025 systematic review of dupilumab in chronic hand eczema by Asamoah found that it consistently improved symptoms and that improvements were observed across several subtypes of eczema.[49] A systematic review and meta-analysis by Riva et al also documented effectiveness.[50] Determination of long-term effectiveness, optimal dosing strategies, and cost-effectiveness requires further research.
A case report by Parmar et al described successful treatment of severe dyshidrotic palmoplantar eczema with tralokinumab.[51]
A case report by Kiszla et al described successful treatment of dyshidrotic eczema with the Janus kinase (JAK) inhibitor upadacitinib.[52]
Phototherapy—in particular, PUVA—is effective in dyshidrotic eczema for controlling disease and maintaining remission[53] ; however, the use of psoralen has been shown to pose a carcinogenic risk to the skin. Although UVA-1 is conventionally combined with psoralen for its photosensitizing effects, it has also shown success in treating palmoplantar eczema when used alone, with the advantage of avoiding the risk associated with psoralen.[54, 24]
PUVA can be administered orally or topically. In a study comparing the effectiveness of the two modalities, dyshidrotic eczema responded well to both oral and topical (bath) treatment, whereas hyperkeratotic eczema showed significantly better clearance with oral therapy than with topical (bath) PUVA.[55]
Narrowband UVB therapy has been shown to be as efficacious as PUVA therapy for dyshidrotic and "dry" types of hand eczema and can be used as an alternative to PUVA, with fewer adverse effects.[56] In accordance with the known immunosuppressive effect of UV radiation, one case report noted resolution of dyshidrotic eczema symptoms with repeated sunlight exposures (though recurrences were not reduced).[57]
Relatively few reports have described the role of narrowband UVB therapy in hyperkeratotic hand eczema. However, narrowband UVB has been used with some success in other hyperkeratotic disorders (eg, palmoplantar psoriasis). In a study comparing PUVA therapy with narrowband UVB therapy for palmoplantar psoriasis, significant improvement was achieved with both modalities, but PUVA was superior to narrowband UVB in reducing clinical severity scores.[58] Because UVA radiation penetrates more deeply into the skin than UVB radiation does, PUVA may be superior to UVB modalities for hyperkeratotic hand eczema.
Other reported treatment options for vesicular palmoplantar eczema have included intradermal injections of botulinum toxin A, x-ray therapy, iontophoresis, sympathectomy,[39] disulfiram (for nickel-induced disease), and (for patients with obstructive sleep apnea [OSA]) continuous positive airway pressure (CPAP).[59]
Botulinum toxin A is a potent neurotoxin that blocks the autonomic cholinergic fibers.[60, 61] In a small (N = 8) controlled left-right hand comparison study, it was shown to improve symptoms of itching and vesicular formation.[62] This therapy may be used alone or in combination with topical steroids. However, its mechanism of action in reducing the severity of palmoplantar eczema is disputed.
One proposed mechanism is disruption of the afferent nerve supply of the skin, which may reduce sweating, because sweat is known to exacerbate the condition. Another mechanism is the possible effect of the toxin on afferent nerve fibers. Blockade of the inflammatory process and inhibition of neuropeptides such as substance P via toxic effects may explain the reduction of pruritus in treated patients.
The inflammatory cells functioning in eczema are highly radiosensitive, and for this reason, x-ray irradiation has been employed to treat some patients with resistant chronic eczema of the hand when other treatments have not been successful. Grenz (Bucky) rays and superficial radiotherapy (RT) were popular treatments for chronic severe hand eczema in the 1980s; however, they have since decreased in popularity, more because of a lack of availability than because of the risk of carcinogenesis.
Superficial RT appears to have a higher success rate than Grenz ray therapy because of its deeper penetration into the skin.[63] One study reported excellent results with the use of superficial RT for palmoplantar eczema, though others have not.[64, 65] In any case, the potential risk associated with RT for a benign non-life-threatening disease must be recognized, and care must be taken to confirm via dosimetry that the maximum safe cumulative lifetime dose is not exceeded. One case report found external-beam megavoltage RT to be successful in treating this condition.
Disulfiram may be administered as a nickel-chelating agent in patients with known nickel sensitivity, but it should not be used in thiuram-sensitive patients.
A case report by Matin et al described a patient with OSA and dyshidrotic palmar eczema whose dermatitis resolved after being placed on a CPAP machine.[66] The authors speculated the resolution of the eczema may reflect the effects of increased tissue oxygenation and decreased circulating inflammatory factors associated with better sleep quality.
A case report by Markantoni et al showed improvement of relapsing dyshidrotic eczema when coexisting hyperhidrosis was treated with the anticholinergic oxybutynin.[67]
Id reactions tend to resolve with treatment of the primary infection. If secondary infection is suspected, systemic antibiotics should be considered. Suspicious lesions should be cultured.
Crisaborole is a small boron-based molecule that inhibits phosphodiesterase 4 (PDE4) and decreases intracellular cyclic adenosine monophosphate (cAMP). It leads to lowered release of cytokines and decreased inflammation. It has been demonstrated to have efficacy in the treatment of mild-to-moderate atopic dermatitis.[68] Its efficacy in vesicular palmoplantar eczema has not been established.
Maintaining a low-cobalt diet has been suggested as a means of decreasing the number of dyshidrotic eczema flares.[69]
Patients with established nickel sensitivity may benefit from nickel-free diets.
Elimination of known exacerbating factors, though often difficult to accomplish, is crucial in preventing relapses of vesicular palmoplantar eczema.
Regular use of hand emollients and avoidance of frequent contact with irritants are important measrues for preventing flareups of vesicular palmoplantar eczema. In one study (N = 120), contact allergy was found to be responsible for 67.5% of cases of pompholyx eczema.[11] All patients should be considered for patch testing to identify relevant allergens.
Patients whose disease is not easily managed should be referred to a dermatologist because vesicular palmoplantar eczema is likely to be a lifelong disease (albeit intermittent in some patients).
Patients in whom a contact allergen is the suspected cause or who do not improve with therapy should be referred to a dermatologist for consideration of a patch test.[11]
The following organizations have released guidelines for the management of hand eczema. Key diagnostic and treatment recommendations have been reviewed and integrated throughout the article:
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