Patients with left-sided vertebral artery stenosis can be treated with medication and surgery as prescribed by the doctor. 1. Drug therapy: patients with left-sided vertebral artery stenosis can usually take aspirin, clopidogrel and other antiplatelet drugs as prescribed by the doctor. For those with high blood lipid levels, statins such as atorvastatin and resuvastatin can be used as prescribed. Those with elevated blood pressure can be treated with nifedipine, hydrochlorothiazide and other blood pressure-lowering drugs. 2. Surgical treatment: mainly divided into endovascular treatment and surgical treatment. In endovascular treatment, common surgical methods include balloon dilatation angioplasty, stent implantation and so on. Surgical treatment mainly includes vertebral artery endarterectomy, vertebral artery grafting, vertebral artery bypass grafting and so on. Patients with left-sided vertebral artery stenosis are advised to actively cooperate with their doctors and undergo regular medical checkups according to their conditions. After the condition is stabilized, the patient should also see the doctor regularly for rehabilitation and functional exercises, which can help improve the quality of life. Pay attention to the rationality of daily diet, appropriate exercise, in order to control weight.