[First-line dermatologic emergencies].

Dermatological emergencies encompass a series of distinct diseases of infectious, autoimmune and environmental origins. They account for a number of consultations at the general practitioner's office and in emergency units of medical centers. The concerned first line medical staffs are then facing some conditions with a dramatic potential. We review the most common conditions including urticaria, angioedema, infectious cellulitis, acute photodermatoses, the Lyell syndrome, some other paroxysmal severe adverse drug reactions, burns, erythroderma and the Kaposi-Juliusberg varicelliform eruption.