My 5 year daughter.rhinitis allergy ige level 1874?is thr any blood test to know what is causing allergy? can it be brought down by medicines?

Allergic: It simply means she carries a very elevated level of the allergic antibody and predisposes her to allergies and the allergic diathesis more than someone with a normal or lower level. No reason to give meds to lower the level, simply treat the symptoms if she has allergies, asthma, eczema, etc...

Allergy test: There are both blood and skin tests for allergies and if you have an allergist in your area they should help het.