Child of this age group can have wheezing when they get common cold or viral upper respiratory infections. If there is a history of allergies, eczema (dry skin) or previous episodes of wheezing, family history of asthma/allergy in 1st degree relation there is a chance then she may develop asthma. Child of 3 yrs have other reasons for wheezing, so we do not diagnose asthma unless if she meets the above criteria. If she develops wheezing, best way to treat is to use Asthalin as a Inhaler with a Spacer device and face mask (Zerostat+Mask). If she is having frequent episodes it is best to add a steroid based inhaler on daily basis (Becorite or Flohale 50). Hope this clarified your query.