It is a common finding when skin disease seems to be cured the respiratory system is affected, usually bronchitis
in young children.
Use of inhalers will not cure him in long term, its temporary, i would suggest some homeopathic
drugs to start from now onwards which will reduce the tendency of sensitivity to cold,give relief from acute attacks,and have no side effects.
I just want to know a few symptoms weather he is attacked by cold with running nose or obstruction of nose, or any choking
of throat, tonsillitis
etc, if u can send summery of x-ray and blood reports that would be fine.
Start-Arsenic alb200 three times a day for three days and twice a day for next four days
Justicia Q and Pothos Q both five drops each thrice a day mixed in warm water for a week(this drop dose can be repeated 4-5 times in case of emergencies very safely)
Use inhalers only at severe wheezing
. Please follow up after 2 weeks.