The examination items of vasculitis include laboratory examination, electron microscopy, immunofluorescence examination, pathology examination and so on. 1. Laboratory examination: it includes routine blood test, routine urine test, rheumatoid factor, blood sedimentation, C-reactive protein, anti-nuclear antibody, anti-chain O and so on, which can initially know the condition of vasculitis. 2. Electron microscopy: this examination can know whether there is invasion of post-capillary veins and early vascular endothelial cells. 3. Direct immunofluorescence examination: this examination is mainly to check whether there are antibodies and complements, and then understand the disease. 4. Pathological examination: it is the gold standard of examination, which can see whether there are capillaries, and whether there are inflammatory cells infiltrating around small blood vessels. When vasculitis occurs, it is necessary to consult a regular hospital in time and receive standardized treatment according to the doctor’s instructions.