Hello
Your son is 8 months old and having severe cough .
This is most probably due to asthmatic allergic
bronchitis .
The sound which you heard was actually due to
bronchoconstriction and typically whistling (
wheezing ) sound develop .
Since this is very common and the main cause is due to certain predisposing factors , these are , DUST , MITE , POLLEN, PESTS ( COCKROACHES ) , FUMES ,
SMOKING ( PASSIVE ) , SUDDEN INCREASE AND DECREASE of temperature , Fibers and of course hereditary .
Once you child will attain the age of 15- 16 years he will not get such
allergy .
So need not to worry .
When such patient visit my clinic I prescribe montelukast+ bambuterol syrup ( 0.2 mg / kg body weight of both drugs ) .
Steam inhalation , hot coffee also help.
Whenever , you notice any fever give him antibiotics , otherwise only this drug will be most suitable for your son.
But this is a prescription drug , so consult your doctor and get his opinion.
You can also use cough syrup .