How to Investigate the Causes of Chronic Cough

Generally, long-term coughing may be caused by various factors such as environmental irritants, unhealthy lifestyle habits, allergic rhinitis, chronic bronchitis, and gastroesophageal reflux disease (GERD). To accurately identify the cause, a comprehensive evaluation including the patient's medical history, symptoms, physical examination, and necessary auxiliary tests is required. Detailed analysis is as follows:

1. Environmental Irritants

Prolonged exposure to dust, smoke, and irritating gases continuously stimulates the respiratory mucosa, triggering reflexive coughing. It is important to move away from polluted environments as soon as possible. Wearing an N95 mask during outdoor activities can help reduce the inhalation of irritants. Indoor use of air purifiers can maintain fresh and moist air, with humidity maintained at 40%-60%.

2. Unhealthy Lifestyle Habits

Long-term smoking or excessive alcohol consumption can damage the respiratory mucosa due to nicotine, tar, and alcohol in tobacco, leading to mucosal congestion and edema, which cause persistent coughing. Smoking should be stopped immediately, and exposure to secondhand smoke should be avoided. Alcohol consumption should also be limited or stopped altogether. Drinking plenty of warm water daily helps maintain moist respiratory mucosa.

3. Allergic Rhinitis

Exposure to allergens such as pollen, dust mites, and animal fur triggers allergic reactions in the nasal mucosa, leading to increased secretions that drain into the throat and irritate it, causing coughing. Antihistamine medications such as Cetirizine Hydrochloride Tablets, Fexofenadine Hydrochloride Tablets, and Loratadine Capsules can be used under a doctor's guidance to alleviate allergic symptoms.

4. Chronic Bronchitis

Chronic nonspecific inflammation of the tracheal and bronchial mucosa and surrounding tissues leads to increased mucus secretion due to long-term inflammation, causing recurrent coughing and expectoration. Under a doctor's guidance, medications such as Amoxicillin Capsules, Cefuroxime Axetil Tablets, and Ambroxol Hydrochloride Oral Solution can be used to control inflammation and promote mucus clearance.

5. Gastroesophageal Reflux Disease (GERD)

Stomach contents reflux into the esophagus and even the throat, irritating the throat mucosa and causing coughing, often accompanied by symptoms such as acid regurgitation and heartburn. Proton pump inhibitors like Omeprazole Enteric-coated Capsules, Rabeprazole Sodium Enteric-coated Tablets, and prokinetic agents like Domperidone Tablets can be used under a doctor's guidance to suppress gastric acid secretion and promote gastric emptying. Elevating the head of the bed by 15-20 cm during sleep can help reduce reflux episodes.

In daily life, maintaining indoor cleanliness and regularly removing dust and mites is important. Avoid eating spicy, overly sweet, or acidic foods to reduce irritation of the respiratory and gastrointestinal tracts. Maintain regular sleep patterns and avoid excessive fatigue. Engage in appropriate physical exercise to enhance respiratory resistance and undergo regular respiratory health check-ups to monitor lung and airway conditions.