Welcome to Healthcaremagic forum.
Yes, even a child can be evaluated by an ENT specialist
or an Allergist specialist if he is suffering from perennial allergy
You should definitely consult one for a thorough evaluation of your son as he could be a case of atopy which can have dermatitis
, rhinitis , dry itchy eyes etc.
In case of allergy or atopy prevention is always better than cure .
Nowadays , however many newer anti allergy medications like mast cell
stabiliser medications(monteleukast ), levocetrizine etc are given to minimise the symptoms and prevent exacerbations.
So it is advisable you discuss with his pediatrician
or the specialists mentioned as per feasibility.
Wishing him a speedy recovery and good health forever.