Staphylococcal scalded skin syndrome !

Staphylococcal scalded skin syndrome is a toxin-mediated infection of young children in which the skin reddens and peels as if scalded.

Updated 2026-11-01

Structures involved

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Skin

Why it happens

What it is

A blistering disease caused by exfoliative toxins from Staphylococcus aureus, released at a distant, often minor site of infection and carried in the blood to the skin. The toxins split the superficial epidermis, causing tender redness, flaccid blisters and widespread peeling. Mucous membranes are spared.

Who gets it

Mainly affects neonates and children under 5, because their kidneys clear the toxin poorly and they lack protective antibodies. Rare in adults, usually those with kidney failure or immunosuppression. Outbreaks occur in neonatal units. Mortality is low in children with prompt treatment but high in affected adults.

Causes

Strains of Staphylococcus aureus (often phage group II) producing exfoliative toxins A and B
Primary focus: nasopharynx, conjunctiva, umbilical stump, ear, skin (impetigo) or a wound
Toxin spread through the blood to the whole skin

Risk factors

Age under 5 years, especially neonates
Kidney failure in adults
Immunosuppression
Exposure in nurseries and neonatal units to carriers

Pathophysiology

Exfoliative toxins are serine proteases that cleave desmoglein 1, a desmosome protein that holds cells together in the granular layer of the epidermis. This causes an intraepidermal split just below the stratum corneum, producing very superficial, fragile blisters and a positive Nikolsky sign. Because desmoglein 1 is not important in mucosa, mucous membranes are spared. Bullous impetigo is the localised form of the same process.

Classification

Localised form: bullous impetigo (toxin acts at the site of infection; blisters contain bacteria)
Generalised SSSS: toxin acts at a distance; blisters are sterile

Symptoms and signs

Prodrome of fever, irritability and malaise, sometimes with conjunctivitis or rhinitis
Tender, painful, diffuse redness, starting on the face, neck, armpits and groin
Large, flaccid, fragile blisters that rupture, leaving moist, shiny 'scalded' erosions
Positive Nikolsky sign (gentle rubbing shears off the skin)
Radial crusting and fissures around the mouth, eyes and nose
No involvement of the mouth, eyes or genital mucosa

Diagnosis

Clinical: Clinical: young child with fever, tender diffuse erythema, superficial peeling, positive Nikolsky sign, periorificial crusts and spared mucosa.
Tests: Cultures from the suspected primary focus (nose, conjunctiva, umbilicus, skin); blister fluid and blood cultures are usually negative in children. A frozen section or biopsy of peeled skin shows a split high in the epidermis (subcorneal), which separates it from toxic epidermal necrolysis (full-thickness necrosis). Electrolytes and kidney function to guide fluids.
Imaging: Not needed.

Differential diagnosis

Toxic epidermal necrolysis (drug-induced, mucosal involvement, full-thickness necrosis)
Bullous impetigo (localised)
Scarlet fever and toxic shock syndrome
Scalds and non-accidental injury
Epidermolysis bullosa and other neonatal blistering diseases

Goal of treatment

Eradicate the toxin-producing staphylococcus, replace fluids, control pain and protect the denuded skin while it re-epithelialises without scarring.

Treatment

Acute: Hospital admission and prompt intravenous anti-staphylococcal antibiotics: a penicillinase-resistant penicillin (such as oxacillin or flucloxacillin) or a first-generation cephalosporin, with vancomycin where MRSA is likely; clindamycin is often added to reduce toxin production. Switch to oral therapy when improving.
Follow-up: Nursing care: fluid balance and intake–output, temperature (risk of hypothermia), pain scores, signs of secondary infection and sepsis.
Conservative: Gentle skin care with emollients and non-adherent dressings, minimal handling, warm environment, adequate analgesia and nutrition; avoid corticosteroids.
Lifestyle: Hand hygiene and contact precautions to prevent spread in nurseries; screening of carriers in outbreaks.

Complications

Dehydration and electrolyte imbalance
Hypothermia
Secondary infection, cellulitis and sepsis
Pneumonia
Higher mortality in adults with kidney disease

Prognosis

In children treated promptly, the skin heals without scarring in about 1–2 weeks and mortality is low. In adults the prognosis is much worse because of comorbidities.

Prevention

Infection control and hand hygiene in neonatal units
Early treatment of staphylococcal skin and umbilical infections
Management of carriers during outbreaks

Test yourself

Think of the answer, then tap the question to see it.

What protein do staphylococcal exfoliative toxins cleave?

Desmoglein 1, causing a split in the granular layer of the epidermis.

Why are mucous membranes spared in SSSS but not in toxic epidermal necrolysis?

Desmoglein 1 is not the key adhesion protein in mucosa; TEN is a full-thickness, drug-induced necrosis that involves mucosa.

Why does SSSS mainly affect young children and adults with kidney failure?

They clear the toxin poorly through the kidneys and may lack protective antibodies.

Are blood and blister cultures usually positive in childhood SSSS?

No; cultures should be taken from the primary focus such as the nose, conjunctiva or umbilicus.

What is the main treatment?

Intravenous anti-staphylococcal antibiotics with supportive care (fluids, skin care, pain control).

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Educational information, not medical advice. For any symptom, see a health professional.

Sources: Staphylococcal scalded skin syndrome (DermNet, 2026).

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Representative model, for educational purposes only.

Skin highlighted on the Durgical 3D model