[Mottling: when the skin unveils shock]

The morbimortality of sepsis and septic shock is high, and their early diagnosis remains difficult for every physician. While it has long been considered primarily a macrocirculatory disorder, research in recent years has brought to light the central place of microcirculation in sepsis. Using clinical signs, for example on the skin, is an effective way to evaluate microcirculation disorder, making it a useful tool for the diagnosis and monitoring of resuscitation during sepsis. Skin mottling can be used as a prognostic tool, enabling the early identification of patients at high risk of complications.