My daughter is 2.5 years old. having a recurrent croup. the croup usually comes after the garden care. is it possible she is allergic to the oak tree ?

Some basics: Traditional croup is an infectious illness caused by a number of upper respiratory viruses. It usually comes on after some visible URI symptoms. There is a form of what is labeled spasmodic croup that is linked to asthma & other allergic diseases. It can come on rather abruptly without URI symptoms. A visit to a pediatric pulmonologist and allergist may help you sort this out.