Thanks for your query
Your baby has allergic laryngitis
along with some other allergic manifestations. Your child may improve with 2 weeks course of inhaled glucocorticoids by pMDI with spacer and face mask along with some anti-histaminic suspension like cetrizine
once daily. You should consult your pediatrician
immediately. This type of allergic illness is common in childhood age group and if it persists beyond 6 years of age it may lead to atopy, allergic rhinitis
and asthma later on. If you have any family history of atopy and asthma then your child has more chance of developing those.