Thank you for following up.
Chronic cough can causes adenoids,
sinusitis,chronic pharyngotracheitis. I suggest -
1.Consult ENT doctor for rule out ethmoiditis,
adenoiditis.
2.Wash his nose with saline water 4-6 times, drop albucid(sulfacil sodium) 3 drops 4 times in nose.
3. Rince gurgle with chrorhexidine
4.Take kuka syrup 2,5 ml 2 times and tulsi juice for boosting immunity
5. Give him hot milk with 1 coffee spoon of turmeric powder for night
6.Hot drinks
7.Lozenges-
strepsils,sualin
8.Take steam inhalations.Steam humidifies back of throat and really helps with the symptoms
9.Avoid cold sour drinks
10.Nasal decongestant(otrivin) if he has
nasal congestion also
11.Keep stomach acid free
He will get better don't worry,just use remedies which i suggest for quick cure.
Wishing you and your family good health!
Regards.
Dr.Sagar Gaurav Shrivastva