Erythroderma: Causes, Symptoms and Treatment
Erythroderma is a severe skin condition in which more than 90% of the body surface is affected by redness and inflammation. It is considered a dermatological emergency.
Things worth knowing about "Erythroderma"
Erythroderma is a severe skin condition in which more than 90% of the body surface is affected by redness and inflammation. It is considered a dermatological emergency.
What is Erythroderma?
Erythroderma (also called exfoliative dermatitis) is a serious and potentially life-threatening skin condition characterized by widespread redness (erythema), inflammation, and scaling affecting more than 90% of the total body surface area. The condition represents a dermatological emergency and requires immediate medical attention.
Causes
Erythroderma is typically not a disease on its own but rather the severe manifestation or progression of an underlying skin or systemic condition. The most common causes include:
- Psoriasis: The most frequent cause, referred to as erythrodermic psoriasis
- Eczema: Particularly atopic dermatitis can progress to erythroderma
- Drug reactions: Medications such as antibiotics, antiepileptics, or allopurinol may trigger erythroderma
- Cutaneous T-cell lymphomas: Especially Sézary syndrome is closely associated with erythroderma
- Other skin conditions: Including pemphigus foliaceus, pityriasis rubra pilaris, or lichen planus
- Idiopathic: In up to 30% of cases, no underlying cause is identified
Symptoms
The symptoms of erythroderma affect almost the entire body and can develop rapidly:
- Widespread, intense skin redness covering more than 90% of the body surface
- Severe scaling and peeling of the skin
- Intense itching (pruritus)
- Edema (fluid accumulation), particularly in the lower legs
- Heat loss due to impaired skin barrier function, potentially leading to hypothermia
- Systemic symptoms such as fever, chills, and fatigue
- Lymph node enlargement (lymphadenopathy)
- In severe cases: rapid heartbeat, circulatory complications, and electrolyte imbalances
Diagnosis
The diagnosis of erythroderma is primarily clinical, based on the characteristic skin appearance. Further investigations are needed to identify the underlying cause:
- Medical history: Pre-existing skin conditions, current medications, underlying diseases
- Skin biopsy: Histological examination of a tissue sample to determine the underlying condition
- Blood tests: Full blood count, inflammatory markers, electrolytes, liver function tests, protein levels
- Immunophenotyping: When cutaneous lymphoma is suspected
- Allergy testing: To rule out allergic causes
Treatment
The treatment of erythroderma is complex and depends primarily on the underlying cause. In severe cases, hospitalization is required.
General Measures
- Inpatient monitoring and circulatory stabilization
- Correction of fluid and electrolyte losses
- Temperature management through adjusted room conditions and dressings
- Skin care with emollients to support barrier restoration
Cause-Specific Therapy
- Psoriasis-related erythroderma: Systemic therapies including methotrexate, ciclosporin, or biologics (e.g., TNF-alpha inhibitors, IL-17 or IL-23 inhibitors)
- Eczema-related erythroderma: Systemic corticosteroids, ciclosporin, or dupilumab
- Drug-induced erythroderma: Immediate discontinuation of the causative medication
- Lymphoma-associated erythroderma: Oncological treatment, e.g., extracorporeal photopheresis
Complications and Prognosis
Erythroderma can cause life-threatening complications, including:
- Sepsis due to bacterial superinfection of the damaged skin
- High-output heart failure caused by increased blood flow through the inflamed skin
- Severe malnutrition resulting from increased protein loss through the skin
The prognosis largely depends on the underlying condition and the general health of the patient. Early and consistent treatment significantly improves outcomes.
References
- Bolognia JL, Schaffer JV, Cerroni L. Dermatology. 4th ed. Elsevier; 2018.
- Sigurdsson V, Toonstra J, Hezemans-Boer M, van Vloten WA. Erythroderma. A clinical and follow-up study of 102 patients. J Am Acad Dermatol. 1996;35(4):523-531.
- World Health Organization (WHO). Skin diseases overview. Available at: https://www.who.int
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