We cough because it is a natural reflex mechanism that helps protect and clear our airways. When irritants like mucus, germs, dust, or allergens stimulate nerves in our throat or lungs, the body triggers a cough to forcefully expel air and remove these substances from the respiratory tract to keep the airways clear and prevent them from reaching the lungs.

How Coughing Works

Coughing involves a deep breath followed by a rapid, forceful exhalation. This burst of air helps to clear mucus, dust, microbes, or other irritants that may have been inhaled, preventing infection and maintaining clear breathing passages.

Common Triggers for Coughing

• Infections such as colds, flu, bronchitis, or pneumonia
• Allergies and post-nasal drip
• Irritation from smoke, dust, pollution, or chemical fumes
• Chronic respiratory conditions like asthma or COPD
• Acid reflux causing irritation of the throat
• Heart-related lung fluid buildup

Each of these conditions can irritate the throat or airway lining, stimulating cough receptors and triggering a cough to clear the irritant.

In summary, coughing is an important protective reflex that helps keep the respiratory system clear of harmful or unwanted substances.