A stroke is a complication coming from a vascular disease, which affects the brain. We differentiate secondary strokes from a hemorrhage (hemorrhagic stroke) and those following a sudden stop of the oxygenation of a part of the brain (ischemic stroke). The main cause of hemorrhagic stroke is high blood pressure while atherosclerosis and embolism are the most common causes of ischemic stroke. A stroke occurs abruptly by the sudden onset of neurological signs and must be urgently addressed, as it can be fatal in the absence of support. Early care reduces the risk of permanent damage such as language disorders, motor disability, or a vegetative state.