What causes vasculitis?

　　Vasculitis may be caused by aging, unhealthy lifestyle habits, adverse drug reactions, abnormal immunity, infections, and other factors. If any abnormalities occur, timely medical attention is recommended. Detailed explanations are as follows:

　　1. Aging: As age increases, the blood vessel walls naturally undergo degenerative changes, losing elasticity and making the vascular endothelium prone to damage, which may trigger vascular inflammatory responses. It is recommended to maintain regular作息 (作息 translates to作息 in English but may be replaced with "lifestyle" or "rest patterns"), engage in mild exercise appropriately, and delay the progression of vascular aging.

　　2. Unhealthy lifestyle habits: Long-term smoking, excessive alcohol consumption, or intake of high-salt and high-fat foods may damage the vascular endothelium, leading to inflammatory responses in the vessel walls. It is recommended to quit smoking, limit alcohol consumption, adjust dietary structure, reduce intake of high-salt and high-fat foods, and consume more fresh fruits and vegetables.

　　3. Adverse drug reactions: Vasculitis may be triggered after taking propylthiouracil tablets, as drug metabolites may stimulate the vascular endothelium, causing inflammatory reactions, accompanied by symptoms such as skin purpura, joint pain, fever, and others. It is recommended to discontinue the relevant medication under a doctor's guidance and treat with drugs such as loratadine tablets, prednisolone tablets, cyclosporine soft capsules, etc.

　　4. Abnormal immunity: Vasculitis caused by systemic lupus erythematosus, for example, occurs when the immune system mistakenly attacks its own vascular tissues, leading to vascular wall inflammation and damage, accompanied by symptoms like rashes, oral ulcers, proteinuria, etc. Doctors generally recommend treatment with medications such as methylprednisolone tablets, cyclophosphamide tablets, hydroxychloroquine sulfate tablets, among others.

　　5. Infections: For example, hepatitis B virus infection can directly attack vascular endothelial cells, triggering immune responses that cause vascular inflammation, accompanied by symptoms such as fever, fatigue, and joint pain. Treatment mainly involves following medical advice to use medications such as entecavir dispersible tablets, tenofovir disoproxil fumarate tablets, prednisone acetate tablets, etc.

　　In daily life, maintaining a healthy lifestyle including balanced diet, moderate exercise, avoiding excessive fatigue, and undergoing regular medical check-ups to detect and treat related diseases early can help reduce the risk of vasculitis.