Generalized erythema, warmth, scaling
Can be pruritic and painful
Abrupt onset if related to drug, contact allergen, or malignancy; gradual onset if related to underlying cutaneous disorder
Generally starts on face and trunk with progression to other skin surfaces
Low-grade fever common
Tends to be a chronic condition, mean duration 5 years
Exfoliative erythroderma
Erythema multiforme
Phytophotodermatitis
Stevens-Johnson syndrome and toxic epidermal necrolysis
Cercarial dermatitis
Drug rash
Pityriasis rosea
DRESS syndrome