Its been a couple years that my mom coughs and sneezes right away after her coughs, we always know that its coming. why?

Sinus/asthma: The persistent cough suggests airway hyperreactivity/asthma. Smking, ipostnasal drip as well as gastroesophageal reflux commonly increase cough. The bronchial tubes become overly sensitive to particulate matter which is inhaled. Best to treat sinus upper airway conditions such as sinusitis and treat cough with inhalers. Check breathing capacity, cxray, sinuses, upper airway, smoking cessartion rx.