is a common problem in this age group. It causes a lot of problem till 7 yrs and then slowly regresses. If there is constant infections then the best treatment for the same is surgery. since your child is small it is better to be conservative in management and steroid
nasal sprays are advocated. You can definitely try any home remedies
to help him feel better like steam, it is better to be given in the night just before his sleep. Since we are practice Allopathy system of medicine I cant comment on any other form of therapy.
I hope you found my response to be helpful and informative. If you have any additional concerns I would be happy to address them.