Our expert says:
Causes of a chronic cough usually are allergies, post nasal drip, medication ( like ACE inhibitor blood pressure medication) but it can also be due to acid reflux, asthma, thyroid masses, irritation of the tympanic membrane of the ear, heart failure or lung cancer. One should at least have a lung x/ray, a full ENT examination, a lung function test, a thyroid examination (sonar or scan if needed) and a gastroscopy to exclude reflux.
This is just a hunch but see what happens if you take an antiacid like Gaviscon 3-4 times per day?
One of my patients had a similar thing - a few hundred rands' tests later we discovered that he was allergic to milk - as soon as he stopped using it the cough subsided ( he is in his 70's and has been drinking milk all his life!) The Science of Medicine is never 100% clear and never fails to surprise you...
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