Persistent cough might be digestive issue: Doctor gives symptoms, tips to manage

Many of us blame allergies, a cold, or a respiratory infection for a persistent cough or wheezing that lasts for weeks. We quickly reach for cough syrups and antibiotics, only to find they offer little to no relief. What if the real culprit behind that stubborn cough isn't your lungs at all, but your digestive system?

If your respiratory treatments are failing, you might be dealing with Gastroesophageal Reflux Disease (GERD), commonly known as acid reflux. Dr Prajusha Mohan, Pulmonologist at Mandiram Hospital, Kottayam, explains.

What is GERD?
When we eat, food travels down the oesophagus into the stomach. A circular band of muscle, or valve, at the bottom of the oesophagus acts as a barrier to prevent food and stomach acid from travelling back upwards. When this valve relaxes abnormally or weakens, stomach acid and undigested food particles can flow back up into the food pipe. This backflow is what we call acid reflux, and when it becomes frequent, it is diagnosed as GERD.

How does acid reflux trigger a cough?
The link between your stomach and your lungs might not seem obvious at first, but they share close pathways. When stomach acid climbs up the oesophagus, it can reach the throat and irritate the larynx and trachea. This happens through two main mechanisms:

Micro-aspiration
Tiny droplets of stomach acid can accidentally find their way into the respiratory tract. Even minute amounts of this acidic fluid can irritate the sensitive lining of your airways, triggering a chronic, persistent dry cough as the body tries to clear the irritation.

GERD-induced asthma
Stomach acid in the throat can trigger a reflex that causes the airways in the lungs to swell and constrict. This can mimic or severely worsen asthma symptoms, leading to chest tightness and wheezing.

Why symptoms flare up during colder seasons
Many people notice their cough and reflux symptoms worsening during the winter or monsoon seasons. This is rarely due to the weather itself, but rather our changing lifestyle habits during these months. We tend to consume more fried, fatty snacks and increase our intake of hot tea and coffee, both of which relax the oesophageal valve. Additionally, cold weather often prompts late-night dinners and going straight to bed, giving acid an easy path to flow upward.

Key symptoms to watch out for
If you are unsure whether your cough is respiratory or digestive, look out for these classic signs of GERD-related cough: a chronic dry cough that worsens at night or when lying down; a burning sensation in the chest (heartburn) or throat; the sensation of a lump in the throat (globus pharyngeus); morning hoarseness or a cracked voice; and unexplained wheezing or shortness of breath.

Effective ways to manage and prevent GERD
Fortunately, simple lifestyle adjustments can make a significant difference in managing acid reflux and easing your cough. Avoid lying down immediately after eating—try to finish your dinner at least two to three hours before bedtime. Elevate the head of your bed or use an extra pillow to let gravity keep the acid in your stomach. Modify your diet by limiting highly spiced, sour, and fatty foods, and cut back on tea, coffee, and carbonated beverages. Eating smaller, more frequent meals rather than large, heavy portions can also help, as large meals put pressure on your stomach. Finally, managing your weight is crucial, as excess abdominal pressure can force the oesophageal valve open.

If your cough and wheezing persist despite using respiratory medications, it is highly recommended to seek advice from a specialist. Consulting a pulmonologist or gastroenterologist can help identify the root cause, as treating acid reflux is the only definitive way to cure this type of cough.

Disclaimer
The medical information provided in this article is for educational purposes only. Always consult a qualified healthcare professional or specialist for proper diagnosis and treatment of persistent health conditions.