Hunain12 months ago

Causes of vasculitis

In most cases, the exact cause is unknown; however, it is clear that the immune system (the system that keeps the body healthy) plays a big role. While the immune system usually works to protect the body, it can sometimes become "overactive" and end up attacking parts of the body. In most cases of vasculitis, something causes an immune or "allergic" reaction in the blood vessel walls. Substances that cause allergic reactions are called antigens. Sometimes certain medicines or illnesses can act as antigens and start this process.