Coughing Whenever the Seasons Change? Why Allergic Rhinitis Triggers a Cough and How to Relieve It

The classic insights of Donguibogam align remarkably well with modern science. Most seasonal coughs and runny noses are closely tied to allergic rhinitis and resulting upper airway cough syndrome. Allergic rhinitis occurs when the immune system mistakenly identifies harmless foreign substances such as pollen, fine dust, or house dust mites as threats, mounting a hypersensitivity reaction. When these allergens contact the nasal mucosa, immune cells known as mast cells release inflammatory mediators such as histamine, which trigger familiar symptoms like a runny nose, sneezing, and nasal congestion. Cold, dry wind allows allergens to penetrate the nasal mucosa more easily and dries out the tissue, worsening the inflammatory response. What Donguibogam describes as 'lung cold' offers an early insight into these environmental influences and physical reactions. Furthermore, when excess mucus produced by this inflammation continuously drips down the back of the throat, it is known as postnasal drip. As this drainage persistently irritates the pharyngeal mucosa, the body senses a foreign substance and triggers a persistent cough, leading to chronic upper airway cough syndrome. This closely matches the Donguibogam explanation that coldness in the lung generates phlegm-fluid, which in turn causes coughing. Modern medicine also highlights the importance of the gut-brain-lung axis, showing that intestinal health plays a major role in immunity and respiratory wellness. Numerous studies show that a diet rich in lactic acid bacteria and a healthier gut environment can help ease allergic reactions, echoing the Korean medicine principle of clearing dampness-phlegm by strengthening the spleen and stomach. Disruptions in the nervous system and endocrine system caused by stress or sleep deprivation can also disturb the immune response and intensify allergy symptoms. In this way, the ancient emphasis on balancing the lung, the spleen and stomach, and systemic immunity is supported by modern scientific mechanisms. Rather than simply suppressing isolated symptoms, restoring the body's immune environment and overall balance remains essential.