If he's coughing really hard and it's a near constant thing(that dry asthmatic cough, not a productive mucousy cough), I would take him in to the ER for a nebulizer treatment or even to the pedi for one. Is he having true trouble breathing where you see his nostrils flaring or any retracting in his rib cage(where the ribs pull in with inhales and the belly gets forced out. you see a very definitive line under the ribs and the skin in between the ribs sometimes gets sucked in too.) Retracting and flaring are very noticable signs of a person struggling to breathe and it means that person needs medical attention.  My 3 year old is an asthmatic and like the previous poster, her trigger is illness. Her inhaler cuts down on the wheezing/cough when we are out without a nebulizer but it doesn't eliminate it entirely and it only buys us 30-45minutes to get home before she's in need of a true breathing treatment. She is not able to be managed on an inhaler solely and I would think ANY asthmatic really can't be managed on an inhaler solely. Has your son officially been diagnosed? You didn't say how old he is.Â
Â
Also, just somethign to think about........sometimes you can't hear the wheeze without a stethoscope. The wheeze is deep down where you can't hear it. I just took my 6 year old into the pedi Monday for prolonged cough and fever that she couldnt' kick and it turned out to be the early stages of pneumonia(that's what I was afraid of). We couldn't hear any wheezing during the appt until the pedi took out the stethoscope for a closer listen and immediately dug out a nebulizer for a breathing treatment in office and a script for a chest xray. she turned up positive for pneumonia in the lower lobes of both lungs. But just listening to her I didn't hear it and she wasn't showing any outward signs of difficulty breahting except that dry hacking cough.
Â
Best of luck to you. Asthma sucks. This week both my youngest two have been on breathing treatments around the clock and it's not easy to deal with. When in doubt, we always hit up the ER or the pedi if it's during business hours. You don't mess around with breathing issues.