Eosinophilic Granulomatosis with Polyangiitis (EGPA) is a rare autoimmune condition that causes inflammation of blood vessels, leading to damage in various organs. It is characterized by the presence of eosinophils, a type of white blood cell, which can accumulate in tissues and contribute to symptoms such as asthma, sinusitis, and skin rashes. The exact cause of EGPA is unknown, but it is associated with antineutrophil cytoplasmic antibodies (ANCA), which can attack the body's own tissues. Treatment typically involves medications like corticosteroids and immunosuppressants to reduce inflammation and manage symptoms effectively.