Condition	Characteristics
Cellulitis	Single, tender, warm, erythematous expanding plaque with or without pus
Cold panniculitis	Erythematous to violaceous nodules or plaques with ill-defined margins at sites of cold exposure; pruritic or painful
Cutaneous lymphoma	Red, scaly patches or plaques
Sweet syndrome	Tender, indurated, erythematous plaques, nodules, or papules; fever, leukocytosis
Urticaria	Transient and migratory erythematous, edematous papules and plaques (wheals); nonfocal, asymmetric distribution