Pediatric Guidelines: Skin & Soft Tissue Infections …

Surrounding cellulitis = marked erythema larger than the extent of overlying induration OR extending > 5cm from abscess for adult-sized patient. Staphylococcus aureus. Other pathogens depending on specific exposures/risk factors. Consider drainage alone if isolated abscess or minor surrounding cellulitis; antibiotic therapy recommended if …

https://idmp.ucsf.edu/pediatric-guidelines-skin-soft-tissue-infections-abscesspurulent-cellulitis