The presence of ischemic foci in the brain is not a cerebral infarction, but a manifestation of cerebral atherosclerosis, suggesting ischemia in the brain. Most patients can be without any clinical symptoms and signs, which can appear when examining cranial MRI, but cranial CT examination is generally normal, and most of them do not need special treatment. Cerebral infarction is a kind of limited ischemic necrosis and softening of brain tissue due to ischemia and hypoxia in the brain, and the lesion can be present on cranial CT and MRI. The patient can present with a variety of different signs and symptoms, depending mainly on the size of the infarct focus and the site of infarction. In the case of small cerebral infarction, most of them only show signs and symptoms of focal neurological deficits, which can include sensory impairment of the lateral limbs, motor impairment, hemianopia, and speech dysfunction in the case of left-sided lesions. In case of a history of cerebellar brainstem lesions, dizziness, nausea and vomiting, balance disorders and ataxia may be present. Patients with large cerebral infarcts can present with disorders of consciousness including drowsiness, somnolence, coma, bulbar palsy, tetraplegia, blurred consciousness and delirium state, and prompt hospitalization for comprehensive treatment if cerebral infarction occurs.