Your kid is having Eosinophilia
i.e. a condition where eosinophils level is increased. Eosinophills are a type of White Blood Cells (WBC), which are associated with control of allergy and asthma. Whenever body is facing allergy, eosinophill count tend to increase.
Common coditions associated with eosinophillia are:-
1. Allergies like asthma, common cold
, hay fever, drug allergy
or skin allergic disorder like Dermatitis
2. Parasitic infestation
You should treat the underlying cause of the allergy.You should also do the deworming of your kid. This will help in ridding of the parasitic infestation, if any.