What are risk factors for cellulitis?

Local trauma (bug bites, laceration, abrasion, puncture wound) – Spread of a preceding or concurrent skin lesion (furuncle, ulcer) Secondary cellulitis from blood-borne infection or from direct spread of subjacent infections (e.g. osteomyelitis) is rare • Following a preexisting skin infection due to compromise of skin barrier (intrerdigital strep, tinea pedis) • Inflammation (local dermatitis, radiation therapy) • Edema and impaired lymphatics in the affected area