Eosinophils are increased as a response to some allergy causing substance. You may have inhaled it, eaten it or it may have come in contact with your skin. If you have fever too, it maybe because of some infection.
This is not permanent, as with treatment your blood values will return to normal.
Next Steps
Just continue the treatment as specified and you should be fine in due course.
Health Tips
If you're able to find out what it was that causes allergy to you, you can avoid it to prevent such occurances in future.