What causes dry mouth and a sticky phlegm in the throat that cannot be fully expelled, and what should I do about it?

Dry mouth and throat with sticky phlegm that cannot be completely expelled are commonly caused by insufficient water intake, dry environments, chronic pharyngitis, postnasal drip syndrome, or chronic bronchitis. Symptoms can be relieved through lifestyle adjustments, medications, and other approaches depending on the specific cause. Detailed analysis is as follows:

1. Insufficient Water Intake

Inadequate hydration causes dryness of the mucous membranes in the throat, increasing the viscosity of secretions and leading to sticky phlegm that is difficult to cough up. It is recommended to drink 1500–2000 mL of water daily, in small amounts and frequently, preferably warm or cool boiled water. Avoid strong tea and coffee.

2. Dry Environment

Low air humidity leads to moisture loss from the throat's mucous membranes, causing secretions to become concentrated and adhere to the throat. Use a humidifier to maintain indoor humidity between 40% and 60%. Wear a mask when going outdoors to reduce irritation from dry air.

3. Chronic Pharyngitis

Long-term irritation leads to chronic inflammation of the pharyngeal mucosa, resulting in congestion, swelling, and production of sticky secretions. Under medical guidance, medications such as Yanyan Tablets, Qinghou Liyan Granules, or Xigua Shuang Throat Lozenges may be used. Maintain a light diet and avoid smoking and alcohol.

4. Postnasal Drip Syndrome

Nasal or sinus inflammation causes nasal secretions to flow backward into the throat, continuously stimulating it and forming sticky phlegm. Follow medical advice to take Loratadine tablets, Mometasone Furoate Nasal Spray, and Eucalyptus Citrus Pine Enteric Soft Capsules, and rinse nasal passages with saline solution.

5. Chronic Bronchitis

Chronic inflammation of the bronchial mucosa increases the amount and viscosity of secretions, making them difficult to expel. Under medical supervision, take Ambroxol Hydrochloride Oral Solution, Cefaclor Capsules, or Salbutamol Aerosol. In severe cases, bronchoscopic suctioning of mucus may be required.

Develop the habit of drinking water regularly and take protective measures in dry environments. If symptoms persist for more than two weeks or are accompanied by fever, chest pain, or other signs, seek timely medical evaluation for accurate diagnosis and to prevent disease progression.