Stroke usually refers to stroke, including ischemic stroke and hemorrhagic stroke. 1. Ischemic stroke: this disease is mainly due to the narrowing or occlusion of cerebral blood vessels, brain tissue ischemia and hypoxia necrosis, which leads to neurological deficits. The causes of morbidity include atherosclerosis of large arteries, cardiogenic factors, hypoperfusion, aortitis and so on. Dizziness, hemiparesis, aphasia, blurred vision and other symptoms can occur. 2. Hemorrhagic stroke: this disease is mainly due to the rupture of blood vessels, blood outflow to the brain tissue caused by compression and necrosis of brain tissue. Causes of cerebral hemorrhage include hypertensive cerebral hemorrhage, rupture of cerebral aneurysm, amyloid cerebrovascular disease and so on. The main symptoms include headache, hemiplegia, aphasia and blurred vision. After the onset of stroke, you should go to the hospital immediately, complete the relevant examinations, and under the guidance of the doctor for treatment.