Intense itching, often preceded by a burning sensation,

Recurrent nature (episodes every 3–6 weeks),

Blisters burst, and painful erosions form, followed by peeling.

2. Causes and Risk Factors
The exact cause is unknown, but the most important factors include:

Excessive sweating (associated with sweat gland dysfunction),

Contact with allergens (nickel, chromium, cleaning products, cosmetics),

Psychological stress (exacerbates symptoms),

Fungal infections (e.g., in people with athlete’s foot),

Atopy (50% of patients also suffer from atopic dermatitis or allergic rhinitis).

3. Diagnosis
Dermatological examination (characteristic appearance of the lesions),

Patch tests (to rule out contact allergy),

Mycological examination (to rule out mycosis),

Skin biopsy (in case of doubt).

4. Treatment