Cerebellar infarction, blood pressure and blood vessels are basically normal in patients with the severity of the disease is related to the infarction site and volume. 1. The severity of symptoms of patients with cerebellar infarction is related to the location of infarction, such as the infarction located in the cerebellar earth part, which can cause patients with ataxia, manifested as unsteady gait and standing; located in the cerebellar hemisphere, which will lead to the mastery of the fine movements can not be completed. 2. The severity of symptoms of patients with cerebellar infarction is related to the volume of infarction, such as the infarction of small volume only leads to the loss of function of the brain area, causing focal neurological symptoms; large cerebellar infarction can lead to the pressure of the brain stem, which leads to cardiac and pulmonary complications, and even coma and death. It should be noted that the severity of cerebellar infarction may also be affected by other factors, which should be determined according to the patient’s condition.