Management of Sunburn with Secondary Cellulitis and Blebs on Feet

Antibiotic Therapy

For typical cases of cellulitis secondary to sunburn, an antibiotic active against streptococci should be initiated, as streptococci are the most common causative organisms in cellulitis 1, 2
Suitable oral agents include Cephalexin, Clindamycin, and Erythromycin 1, 3
For more severe cases with systemic signs of infection, parenteral therapy may be indicated with Nafcillin, Cefazolin, Clindamycin, or vancomycin 1, 3
The recommended duration of antibiotic treatment is 5 days, but should be extended if the infection has not improved within this time period 2, 4

Elevation of the affected feet is crucial to promote gravity drainage of edema and inflammatory substances 3, 4
Systemic corticosteroids could be considered in non-diabetic adult patients to attenuate inflammation and hasten resolution 3, 5
Keep the skin well hydrated with emollients to avoid dryness and cracking 4

Address predisposing factors such as interdigital toe spaces and treat any fissuring, scaling, or maceration 2, 4
Treat tinea pedis if present 3
Manage any underlying venous insufficiency or lymphedema 4
For patients with recurrent episodes of cellulitis, consider prophylactic antibiotics, such as oral penicillin V or erythromycin, or monthly intramuscular benzathine penicillin injections 4, 6

Consider hospitalization if there is concern for deeper or necrotizing infection, severe immunocompromise, systemic inflammatory response syndrome (SIRS), altered mental status, or hemodynamic instability 2, 5

Failure to elevate the affected extremity, which can delay resolution 3, 4
Not addressing underlying conditions like tinea pedis or venous insufficiency 4
Inadequate duration of antibiotic therapy when improvement is slow 2
Not examining interdigital spaces, which can harbor pathogens and lead to recurrent infections 2, 4

The Infectious Diseases Society of America recommends that patients with recurrent cellulitis should have their interdigital toe spaces carefully inspected for fissuring, scaling, or maceration, and treated to eradicate pathogen colonization and reduce recurrence risk 7, 8
Lymphedema and venous insufficiency significantly increase recurrence rates and must be managed with compression therapy and elevation, according to the Clinical Infectious Diseases guidelines 7
Obesity is an independent risk factor for cellulitis recurrence, and weight reduction should be pursued, as recommended by the Clinical Infectious Diseases guidelines 7
Prior trauma or surgery should be documented as they increase the risk of recurrence, according to the Clinical Infectious Diseases guidelines 7

The Clinical Infectious Diseases guidelines recommend that patients with 3-4 episodes of cellulitis per year should be initiated on prophylactic antibiotics, such as oral penicillin or erythromycin, in addition to managing predisposing risk factors 7
Prophylaxis should continue as long as predisposing factors persist, according to the Clinical Infectious Diseases guidelines 7

Annual recurrence rates range from 8-20% after the first episode, with risk increasing after repeated episodes, according to the Clinical Infectious Diseases guidelines 7
Patients with lymphedema, venous insufficiency, or toe web abnormalities have the highest risk of recurrence, according to the Clinical Infectious Diseases guidelines 7

Prophylaxis should continue indefinitely while predisposing factors persist, according to the Clinical Infectious Diseases guidelines 7
Risk factors should be re-evaluated every 6-12 months to determine if prophylaxis can be safely discontinued, according to the Clinical Infectious Diseases guidelines 7