Bleach Baths for Prevention of Recurrent Bacterial Infections in Atopic Dermatitis

Primary Prevention Strategy

The American Academy of Dermatology and the Joint Task Force recommend bleach baths (0.005% sodium hypochlorite) twice weekly combined with intranasal mupirocin for patients with atopic dermatitis prone to skin infections, with Level A evidence supporting this approach 1, 2
The concentration of sodium hypochlorite for bleach baths should be 0.005%, which is approximately ½ cup of household bleach in a full bathtub of water 1, 2
Bleach baths should be administered twice weekly for optimal efficacy 1, 2
Combination therapy with intranasal mupirocin ointment is recommended for optimal efficacy 1, 2

The American Academy of Dermatology conditionally recommends against long-term oral antibiotics for prevention in non-infected atopic dermatitis, as they increase resistance and provide no sustained benefit 2, 3, 4, 5
Systemic antibiotics should be reserved exclusively for patients with clinical evidence of active bacterial infection, such as purulent exudate, pustules, or crusting with systemic signs 2, 3, 4
Long-term topical antibiotics are not recommended due to increased risk of bacterial resistance and skin sensitization 6, 7

Topical corticosteroids and calcineurin inhibitors reduce S. aureus colonization by decreasing inflammation and improving skin barrier function 6
Liberal emollient use is essential to provide a lipid film that retards water loss, and should be applied after bathing 1, 2
Regular bathing with warm water followed by immediate emollient application is recommended 1, 2

Clinical signs requiring systemic antibiotics include increased crusting, weeping, purulent exudate, or pustules 3, 4, 5
First-line antibiotic treatment should target S. aureus, such as flucloxacillin or cephalexin 8
Topical corticosteroids should be continued during the infection, and not discontinued 3, 4, 8

Frequent bathing with soap and water should be avoided, as it removes natural lipids and worsens the barrier defect that predisposes to infection 9, 10
Soap-free cleansers or dispersible creams should be used as soap substitutes to minimize skin irritation 9, 10