What causes eosinophilia?

What causes eosinophilia?

Many conditions cause your eosinophil counts to increase in your blood. Some conditions, like seasonal allergies, asthma and reactions to medications are very common, and often aren’t very serious. Infections, especially from parasites, can also lead to eosinophilia. Problems with immune regulation can also cause eosinophilia, including autoimmune diseases like inflammatory bowel disease, autoimmune myocarditis, vasculitis and sarcoidosis. Blood cancers that make these cells inappropriately can also cause eosinophilia. Finally, genetic changes that are hereditary (passed on by your biological parents) can cause eosinophilia.