Hello.
Thank you for asking at HCM.
From your history, I guess your son is having
allergic rhinitis, which is not controlled despite medications.
I would like to suggest him to take a combination of
montelukast &
levocetirizine regularly for 2 weeks. I would also suggest him to use nasal saline spray 3-4 times daily.
Avoidance of dust,
cold air exposure, smoke & air pollution will definitely help.
If he is allergic to pollens, it is advisable to close up the house during high pollen count days. However, if he is not allergic to pollens and allergic to house dust mite & indoor molds, I would suggest to ensure proper ventilation and sunlight into the house to reduce humidity and increase temperature. So that depends on what he is really allergic to. I would suggest you to get
allergy testing done, if not already done.
Hope this will help you.
Wish your son best of the health.
Regards.