A persistently high eosinophil count (Eosinophilia) is often due to allergies, asthma, parasitic infections, or certain skin or immune conditions, so you should identify and treat the underlying cause rather than just the count; consult a doctor for evaluation including allergy history, stool tests for parasites, and other blood tests, and treatment may include anti-allergic medicines or deworming if needed, along with avoiding known allergens and maintaining good hygiene.