Dr. Fred Hsieh discusses eosinophilic-related diseases and their possible causes, such as allergic diseases or parasitic infection. He covers the best way to proceed when your CBC report shows a high eosinophil number and what hypereosinophilia syndrome actually is. Dr. Hsieh reviews the challenge in treating eosinophilic-related diseases with corticosteroids, and new, FDA-approved treatments that use eosinophil-targeting biologics to reduce the eosinophils in the blood.