Clinical Description of Hand Eczema
Hand eczema is a heterogeneous inflammatory skin disease affecting the hands and wrists, characterized by erythema, scaling, pruritus, pain, burning sensation, and often fissuring, with variable clinical presentations that can be acute or chronic, affecting palmar and dorsal surfaces, fingers, fingertips, and wrists. 1, 2
Clinical Presentation
Hand eczema manifests with diverse morphological patterns that vary in severity and appearance over time. The most commonly affected anatomical sites include:
- Palms (56.6% of patients)
- Fingertips (41.6%)
- Backs of hands (40.8%) 3
Primary Clinical Features
The cardinal signs and symptoms include:
- Erythema (most frequent sign)
- Pruritus (most frequent symptom)
- Scaling
- Fissuring
- Pain and burning sensation
- Induration (in chronic hyperkeratotic forms) 4, 1, 3
Clinical Subtypes by Morphology
The clinical presentation varies significantly based on the subtype. Chronic hyperkeratotic hand eczema presents with induration, scaling, and fissuring, while pompholyx (dyshidrotic eczema) presents differently with vesicular eruptions 4. This morphological heterogeneity is why simplified assessment tools measuring only three variables (induration, scaling, fissuring) are useful only for certain types like chronic hyperkeratotic hand eczema but inadequate for others 4.
Etiological Classification
Hand eczema is classified based on suspected main causes:
- Irritant contact dermatitis (40.1% of moderate-to-severe cases)
- Atopic hand eczema (33.1%)
- Allergic contact dermatitis (27.5%) 3
A critical clinical caveat: The pattern and morphology of hand dermatitis is unreliable in predicting cause and distinguishing atopic/endogenous dermatitis from contact irritant or contact allergic etiology 4. This means you cannot diagnose the subtype based on appearance alone—detailed history and patch testing are essential.
Chronicity Definition
Hand eczema is defined as chronic when it persists for more than 3 months or recurs at least twice within one year 5, 6. Up to two-thirds of affected individuals develop chronic disease with substantial personal and occupational disability 1.
Key Historical Features to Elicit
The British Association of Dermatologists guidelines 4 specify essential historical points:
Atopic history: Personal history of childhood atopic dermatitis, asthma, hay fever, or family history of atopy (43.8% of moderate-to-severe CHE patients have history of atopic dermatitis) 3
Distribution pattern: Where symptoms began and how they spread
Product exposure: Cosmetics, personal-care products, topical medications, clothing, bandages, gloves
Wash products: Detailed history of all products contacting skin, as most contain harsh emulsifiers/surfactants causing barrier damage in predisposed individuals 4
Activity-related triggers: Hairdressing, holidays, home improvements, painting, decorating, recreation, sport
Occupational factors: Detailed workplace history, products handled, health and safety data sheets review
Environmental variation: Improvement during weekends/holidays with recurrence on return to work suggests occupational etiology
Photosensitivity: Worsening after sunlight exposure
Irritant exposure: Both wet agents (water, frequency of hand washing) and dry, desiccating products 4
Clinical Assessment
Use standardized clinical assessment tools for both initial evaluation and treatment response monitoring 4:
- Hand Eczema Severity Index (HESI) - comprehensive objective scoring
- Dermatology Life Quality Index (DLQI) - generic quality of life measure
- Investigators Global Assessment (IGA) - simplified tool measuring induration, scaling, fissuring (quick but only valid for chronic hyperkeratotic type, not pompholyx) 4
Important Clinical Pitfall
Many patients with moderate-to-severe chronic hand eczema have no atopic condition besides CHE and no history of atopic dermatitis, indicating that CHE is not simply atopic dermatitis of the hands 3. This challenges the assumption that hand eczema in adults is primarily an extension of atopic disease and underscores the importance of considering irritant and allergic contact dermatitis even in the absence of atopic history.