Unstoppable Cough and Sticky Phlegm: Phlegm-Fluid May Be the Cause

Examining this through the lens of modern medicine reveals clear reasons behind sticky phlegm-fluid. Persistent sticky phlegm, a minor cough, foreign body sensation in throat, and postnasal drip are important signs that indicate an imbalance in the respiratory mucus system and a chronic inflammatory state. The respiratory tract is normally covered with moist mucus, which plays an essential role in filtering and expelling external harmful substances such as bacteria, viruses, and dust. However, chronic stress, irregular lifestyle habits, environmental factors like fine dust, and underlying diseases such as gastroesophageal reflux disease or allergic rhinitis can easily disrupt the delicate balance of this mucus system. Mucus-producing cells become excessively stimulated, or the viscosity of the mucus increases abnormally, making it thick and increasing its volume. This sticky mucus impairs ciliary movement, hindering normal clearance and causing mucus to pool inside the respiratory tract, where it easily becomes a breeding ground for bacteria. In particular, postnasal drip, a condition where excess nasal mucus drips down the back of the throat due to overproduction or high viscosity, is often the primary cause of globus pharyngeus and a chronic minor cough. Additionally, gastroesophageal reflux disease, in which gastric acid flows backward to irritate the esophagus and laryngopharynx, triggers inflammation in the respiratory mucosa and promotes mucus hypersecretion. This sets off a chain reaction that further worsens sticky phlegm and cough. This chronic inflammatory state is not confined to the respiratory system alone; it can also affect the systemic immune response and disrupt the autonomic nervous system. The body constantly responds to external stimuli and works to heal itself, but persistent chronic inflammation and mucus hypersecretion exhaust this healing mechanism, ultimately diminishing overall vitality. The discomfort experienced may not be a simple cold, but a deeper signal sent by the body.