Small Vessel Vasculitis is a type of inflammation that affects the small blood vessels in the body, including capillaries, venules, and arterioles. This condition can lead to damage in various organs, such as the skin, kidneys, and lungs. Symptoms may include rashes, fatigue, and organ dysfunction, depending on which vessels are affected. The exact cause of Small Vessel Vasculitis is often unknown, but it can be associated with autoimmune diseases, infections, or certain medications. Diagnosis typically involves blood tests, imaging studies, and sometimes a biopsy of affected tissue. Treatment usually includes corticosteroids and other immunosuppressive medications to reduce inflammation.