Thick phlegm in the throat

Thick phlegm in the throat can be caused by both physiological and pathological factors. Common underlying conditions include allergic sinusitis, bacterial pneumonia, and others. Patients should adopt appropriate treatment measures according to their specific condition.

1. Physiological Factors

If an individual is exposed to dusty environments, has inadequate water intake, or suffers from poor sleep quality, ciliary activity in the airways may become impaired or oxygen perfusion in upper respiratory tissues may be reduced. These factors can enhance the secretory function of glandular tissues in the upper respiratory tract, leading to physiological symptoms such as coughing, sputum production, and thick phlegm. Affected individuals can rapidly relieve or eliminate these symptoms by removing the adverse influences—such as avoiding polluted environments, increasing fluid intake, and improving sleep quality.

2. Pathological Factors

1) Allergic Sinusitis

Repeated exposure of the sinus tissues to allergens such as pollen or chemical fumes may trigger a non-specific immune response in local glands and capillaries. The continuous secretion of tissue fluid can easily flow backward into the throat, forming thick phlegm. Once the cough center is stimulated, reflexive coughing and sputum production may occur. Patients experiencing these symptoms may, under medical guidance, use antiallergic medications such as loratadine capsules, oxymetazoline hydrochloride nasal spray, or Tongqiao Biyan tablets.

2) Bacterial Pneumonia

After the lungs are infected with pathogenic bacteria, the pulmonary immune system becomes hyperactive. Capillaries and alveoli in the lungs continuously secrete tissue fluid, which becomes concentrated into thick phlegm. As sputum accumulates, patients expel it through coughing. Based on biochemical tests and under strict medical supervision, patients may use medications such as benzathine penicillin for injection, cefaclor granules, or budesonide suspension for inhalation to suppress the growth and reproduction of susceptible bacteria and alleviate symptoms like cough and sputum production.

Other conditions, such as nasopharyngeal carcinoma, may also cause similar symptoms. If symptoms persist or worsen, timely medical evaluation and more detailed diagnostic testing are necessary to confirm the diagnosis and initiate proper treatment.