Why do I always cough at night?
Sep 27, 2022
Source: Cainiu Health
Dr. Guo Xiheng
Introduction
Coughing that always occurs at night may be caused by allergic asthma, bronchitis, gastroesophageal reflux disease (GERD), cough-variant asthma, or other reasons. If the cough is accompanied by phlegm, it could indicate acute exacerbation of chronic obstructive pulmonary disease (COPD) or pulmonary infection. It is recommended that patients undergo a thorough evaluation at a hospital and, under the guidance of a qualified physician, select an appropriate treatment plan.
Constant coughing at night may be caused by conditions such as allergic asthma, bronchitis, gastroesophageal reflux disease (GERD), or cough-variant asthma. If the cough is accompanied by phlegm, it could be due to acute exacerbation of chronic obstructive pulmonary disease (COPD) or pulmonary infection. Patients are advised to visit a hospital for comprehensive evaluation and, under the guidance of a qualified physician, select an appropriate treatment plan.
1. Allergic Asthma
If allergens such as pollen, animal dander, or dust are present in the bedroom, inhaling them during sleep can irritate the airways, increase airway permeability, trigger asthma, and lead to coughing.
2. Bronchitis
If a patient has poor immune function and fails to stay warm at night, resulting in a chill, bronchitis may develop. This causes inflammatory swelling and congestion of the bronchial mucosa, leading to persistent nighttime coughing.
3. Cough-Variant Asthma
This is a distinct type of asthma characterized by chronic cough as the primary or only clinical symptom. It typically presents as a long-lasting, stubborn dry cough, often triggered by inhaling irritants, cold air, exposure to allergens, physical exercise, or upper respiratory tract infections. Some patients experience coughing without any identifiable triggers. The cough frequently occurs at night or in the early morning and is usually of a hacking, irritative nature.
4. Productive Cough (with Phlegm)
This is commonly seen in cases of acute exacerbation of COPD or lung infections. When upright, patients may have minimal coughing, but when lying down at night, changes in body position cause accumulated phlegm to shift, leading to increased coughing and sputum production. In some cases, coughing up blood may also occur.
When a patient experiences persistent nighttime coughing, prompt medical evaluation at a hospital is necessary to identify the underlying cause and receive targeted treatment under the supervision of a healthcare professional.
