Cerebral ischemic foci are an imaging manifestation seen in acute and chronic cerebral infarction and chronic cerebral ischemia. Chronic cerebral infarction or cerebral ischemia may be asymptomatic or present with neurological symptoms left over from acute cerebral infarction, similar to the acute phase, but are often difficult to treat and do not require treatment. The symptoms and treatments of acute cerebral infarction are as follows. 1. Symptoms: The clinical manifestations of cerebral ischemia in different parts of the brain are different. (1) Ischemia of anterior cerebral artery will show numbness and weakness of limbs, as well as mental symptoms, memory loss, personality change and other clinical manifestations. (2) Middle cerebral artery ischemia will show three symptoms, such as hemiplegia, hemiplegia, hemianopsia, hemianopsia, and so on. (3) Posterior circulation ischemia may cause dizziness, nausea, vomiting, choking on drinking water, difficulty in swallowing and other clinical manifestations. 2 Treatment: It is necessary to choose the appropriate treatment according to the degree of the patient’s condition. (1) Drug therapy: anti-platelet and anticoagulant drugs to prevent cerebrovascular thrombosis, such as aspirin, clopidogrel, warfarin, rivaroxaban and so on. (2) Surgical treatment: For patients with highly narrowed cerebral blood vessels, the doctor can determine whether it is necessary to place a stent for interventional therapy to correct ischemia according to the specific situation. Patients who are found to have ischemic foci need to be standardized under the guidance of doctors.