Hello Popping feeling in the abdomen is due to strain caused by forceful coughing, but this is not a cause of concern. The main cause of concern is cough and asthma . When such patient visit I usually prescribe my patient to take montelukast+ bambuterol tablet once or twice in day , according to severity of symptoms . Usually patient respond this treatment very well and don t require any medicine . Since you are an old asthmatic patient so avoidance is also important . Mite , dust , pollen , hay , fodder, sudden fall and rise of temperature , pests, smokes are certain predisposing factors . Hot coffee and steam also provide some relief in asthma patient . Don t take steroid as far as possible.