When localized stenosis of the left posterior cerebral artery occurs, medication, stent implantation, thrombolytic therapy or surgery can be used. 1. Pharmacological treatment: When patients are combined with risk factors of cerebrovascular disease such as hyperlipidemia and hypertension, it can cause localized lipid plaque formation in the left posterior cerebral artery, which leads to localized narrowing of the lumen. Atorvastatin calcium can be used to lower lipid, nifedipine extended-release tablets to lower blood pressure, ginkgo biloba soft capsules to improve circulation and other treatments. 2. Stent implantation: If the patient has localized stenosis of the left posterior cerebral artery caused by congenital posterior cerebral artery malformation, and the condition is more serious, stent implantation can be carried out. 3. Thrombolytic therapy: If the patient has localized stenosis of the left posterior cerebral artery due to the blockage of the embolus, thrombolytic therapy can be carried out with drugs such as alteplase. 4. Surgery: When arterial thrombolysis is ineffective, surgical thrombolysis can also be performed according to the condition. When the patient has localized stenosis of the left posterior cerebral artery, it is necessary for the patient to consult a doctor in time, and individualized treatment can be carried out according to the condition under the guidance of a professional doctor.