What causes constant phlegm?

Generally speaking, persistent phlegm may be caused by factors such as overactive mucous glands, pharyngitis, bronchitis, bronchiectasis, or interstitial pneumonia. It is recommended to seek medical attention promptly, identify the underlying cause, and receive symptomatic treatment under the guidance of a qualified physician. Specific analyses are as follows:

1. Overactive mucous glands: This may lead to excessive production of phlegm that accumulates in the mouth, creating a constant sensation of having phlegm. This condition is usually normal and does not require special treatment.

2. Pharyngitis: This may be related to long-term inhalation of harmful gases or dust, or inflammation of adjacent organs. Symptoms include a foreign body sensation or itching in the throat. Viscous secretions often adhere to the posterior pharyngeal wall, causing frequent bouts of irritating cough upon waking, sometimes accompanied by nausea. Patients are advised to take medications such as amoxicillin capsules, roxithromycin tablets, or azithromycin capsules as prescribed by their doctor to alleviate symptoms.

3. Bronchitis: This may be associated with factors such as smoking and air pollution. Symptoms include chronic cough and sputum production, with increased phlegm expectoration in the morning. Patients are advised to follow medical instructions and use medications such as cefaclor for oral suspension, azithromycin capsules, or cefixime capsules to improve symptoms.

4. Bronchiectasis: This may be related to genetic factors or pathogen invasion. Typical symptoms include chronic cough, production of large amounts of purulent sputum, and recurrent hemoptysis (coughing up blood). Patients should strictly follow medical advice and use medications such as bromhexine hydrochloride tablets, salbutamol aerosol, or sustained-release theophylline tablets for treatment.

5. Interstitial pneumonia: This is associated with environmental pollution and inhalation of dust. The disease may cause inflammatory exudation, leading to excessive secretion from bronchial glands and resulting in phlegm formation. Patients may also experience symptoms such as dry cough, shortness of breath, and fever. It is recommended that patients receive treatment under a doctor's supervision using medications such as prednisone acetate tablets, azathioprine tablets, or pirfenidone tablets.

In daily life, it is advisable to maintain a light diet, consume more fresh vegetables, fruits, and other vitamin-rich foods—such as bok choy, spinach, and kiwifruit—and keep indoor air fresh. Avoid prolonged exposure to heavily polluted environments, which can aid in recovery.