Upper Extremity Cellulitis/Abscess Management

Critical Diagnostic Considerations

The American College of Physicians recommends determining whether the patient has purulent versus nonpurulent cellulitis, as this changes the antibiotic approach, with β-hemolytic streptococci being the primary pathogens in nonpurulent cases and Community-acquired MRSA (CA-MRSA) being the predominant pathogen in purulent cases 1
The Infectious Diseases Society of America suggests that empiric MRSA coverage is not routinely needed for nonpurulent cellulitis, but is indicated for purulent cellulitis or abscess 1

The World Journal of Emergency Surgery recommends immediate surgical consultation for patients with rapidly spreading erythema, severe pain, skin necrosis, crepitus, or systemic toxicity, as these are red flags for necrotizing soft tissue infection 2
The World Journal of Emergency Surgery suggests that abscesses at IV drug injection sites are complex and require broad-spectrum coverage for Gram-positive, Gram-negative, and anaerobic bacteria, as well as adjunctive antibiotics 2

The Clinical Infectious Diseases journal recommends first-line treatment with β-lactam antibiotics targeting streptococci for nonpurulent cellulitis, with cephalexin 500 mg PO four times daily for 5-10 days being a suitable option 1
The Clinical Infectious Diseases journal suggests that empiric MRSA coverage should not be added to β-lactam therapy unless the patient fails to respond within 48-72 hours or has systemic toxicity, documented MRSA colonization, or prior MRSA infection 1

The Clinical Infectious Diseases journal recommends obtaining cultures when patients are treated with antibiotics, have severe local infection or systemic illness, or have inadequate response to initial treatment, as well as in immunocompromised hosts or when there is concern for outbreak or unusual pathogen 1

The Praxis Medical Insights guidelines suggest elevating the affected extremity to promote drainage of edema and inflammatory mediators, as well as using warm compresses for symptomatic relief 3

The Praxis Medical Insights guidelines recommend hospitalizing patients with systemic inflammatory response syndrome (SIRS) criteria, hemodynamic instability, severe immunocompromise, failed outpatient therapy, poor adherence anticipated, or concern for necrotizing infection 4