Stenosis is the narrowing of the lumen of blood vessels and slow blood flow due to various reasons, commonly caused by atherosclerosis, thrombosis, vasculitis, etc. Stenosis requires different treatments according to the severity of the stenosis, as follows: 1. Control diet and exercise: Patients need a low-salt, low-fat diet, absolute cessation of smoking and alcohol, regular review, adjustment of lifestyle habits, and appropriate exercise and sports. 2. Medication: If the stenosis is caused by atherosclerosis, anti-platelet, lipid-lowering and other anti-atherosclerotic treatments are required. If the stenosis is caused by thrombosis, anti-platelet, anticoagulation and other treatments are needed. If the stenosis is caused by vasculitis, in addition to antiplatelet and anticoagulation therapy, such as statin lipid-lowering drugs, rheumatologic and immunologic indicators need to be detected to control the development of vasculitis.3. Surgical treatment: If the stenosis is severe, you should go to vascular surgery for systematic assessment of the stenosis and angiography to see if surgical or interventional treatment is needed to release the stenosis.