Thank you for your query.
It is very difficult to make any conclusion without the examination of the child. I suggest that you discuss with your doctor who shall examine him and guide you accordingly.
As far asthma
is concerned it is advisable to follow a protocol for its management. The doctor will guide you to record his peak flow metery findings and keep him on appropriate long term relievers so that he does not have problems.
I hope I have answered your query to your satisfaction.
Wishing your son an early recovery.