Vasculitis and vasculitis are both vascular lesions, in addition to lesions involving parts of the blood vessels, the pathogenesis, clinical manifestations and treatment are different, as follows: 1, the pathogenesis, vasculitis is mainly due to immune inflammation, while vasculitis is mostly due to thrombo-occlusion; 2, clinical manifestations, vasculitis can involve the whole body, belonging to the systemic inflammatory manifestations, while vasculitis is mostly manifested as local ischemic symptoms; 3, treatment. Vasculitis treatment requires hormones and immunosuppressants, while vasculitis treatment is based on anticoagulation and blood activation; 4, vasculitis and vasculitis are two types of diseases, and the consultation departments are not the same. Vasculitis is usually seen in the Department of Rheumatology and Immunology, but vasculitis is usually seen in the Department of Vascular Surgery.