Cerebral thrombosis clinically includes cerebral infarction and cerebral embolism, and cerebral thrombosis is more serious. Cerebral thrombosis includes cerebral embolism mostly due to occlusion of blood vessels caused by dislodged emboli, which can be clinically associated with sudden neurological deficits and, in severe cases, with impaired consciousness. If the cerebral embolism is caused by cardiac disease, anticoagulation therapy is required when necessary. Cerebral infarction is clinically mostly caused by atherosclerotic vascular occlusion, which is manifested as cerebral infarction due to vascular vitreous changes caused by hypertension, hyperglycemia, etc. Small vessel occlusion occurs. Infarcts in the brainstem area can also present with impaired consciousness, but they are relatively rare clinically. Cerebral thrombosis is clinically more severe because it includes cerebral embolism as well as cerebral infarction.