A 62-year-old non-smoker experiencing a chronic cough with yellow-green phlegm over six months may be facing conditions such as silent acid reflux or bronchiectasis, according to medical experts. The individual, who has no history of asthma or lung disease, maintains a healthy lifestyle and reports no alarming symptoms like weight loss or breathlessness. A chest X-ray had previously shown no abnormalities.

Silent reflux, or laryngopharyngeal reflux, occurs when stomach acid rises into the esophagus during sleep, irritating the lining without causing typical heartburn or indigestion. This irritation may extend to the throat and airways, leading to inflammation and increased mucus production. The greenish tint of the phlegm can result from inflammatory cells present in these secretions.

Another potential cause is bronchiectasis, a condition characterized by dilation and damage to the airways, which impairs the function of cilia—tiny hair-like structures responsible for clearing mucus. This dysfunction can create a cycle of persistent inflammation and infection, allowing bacteria to thrive in the airways. Chronic productive coughing is a hallmark symptom of bronchiectasis. Known triggers include prior infections such as whooping cough and pneumonia, although in many cases, the underlying cause remains unidentified.

Diagnosing bronchiectasis often requires more advanced imaging than a chest X-ray, with computed tomography (CT) scans providing clearer detail of airway changes. Additionally, sputum samples collected on multiple occasions can help identify bacterial infections and guide antibiotic treatment.

Management of bronchiectasis may involve prolonged antibiotic courses in conjunction with physiotherapy techniques, including postural drainage, to facilitate mucus clearance from the lungs. These methods aim to reduce infection risk and improve respiratory function over time.

Medical professionals advise that individuals experiencing similar symptoms consult their primary care providers to explore these possibilities further. Investigations such as CT imaging, sputum analysis, and evaluation for silent reflux can help determine the appropriate diagnosis and treatment plan.