What causes excessive white phlegm?

Generally speaking, excessive white phlegm may be caused by factors such as environmental irritation, allergic rhinitis, pharyngitis, bronchitis, pneumonia, and others. It is recommended to seek medical attention promptly, identify the underlying cause, and receive symptomatic treatment under the guidance of a qualified physician. Specific analysis is as follows:

1. Environmental irritation: Long-term exposure to heavily polluted environments or chronic smoking may irritate the mucous membranes of the throat, leading to increased production of white phlegm. Patients are advised to avoid such environments whenever possible and quit smoking, which can help alleviate this symptom.

2. Allergic rhinitis: This may be triggered by allergies to certain substances, such as pollen or house dust mites. Allergic reactions can increase nasal secretions, which then drain into the throat and form white phlegm. Patients should follow medical advice to use medications such as fluticasone propionate nasal spray, cetirizine hydrochloride oral solution, or budesonide nasal spray.

3. Pharyngitis: This condition may be associated with long-term inhalation of harmful gases or dust. Common symptoms include dryness and itching in the throat, along with increased white phlegm. Patients are advised to take medications such as compound Honeysuckle granules, amoxicillin capsules, or roxithromycin tablets as directed by a physician.

4. Bronchitis: Often linked to long-term smoking or exposure to harmful gases, bronchitis commonly presents with persistent coughing and sputum production, typically white in color. Patients should use medications such as cephalexin dry suspension, azithromycin capsules, or cefixime capsules under medical supervision to relieve symptoms.

5. Pneumonia: Usually caused by pathogens such as bacteria or viruses, pneumonia symptoms include fever, cough, and production of white or yellow phlegm. Patients are advised to take medications such as tinidazole capsules, penicillin V potassium tablets, or ribavirin granules as prescribed.

Patients are encouraged to maintain a light diet and consume fresh vegetables and fruits—such as radishes and apples—to support nutrition and promote recovery. At the same time, spicy and irritating foods like chili peppers and Sichuan pepper should be avoided to prevent worsening of symptoms.