A dry cough at night may be associated with low environmental humidity and temperature, cough variant asthma, pharyngitis and so on.
1. Low environmental humidity and temperature: the air in the house at night is dry and not circulating, the environmental humidity decreases, stimulating the bronchial mucosa causing irritating cough. At the same time, because the temperature at night is lower than during the day, it is easier to stimulate the cough reflexes, so the cough symptoms are more serious at night.
2. Cough variant asthma: cough variant asthma patients, because of the night vagus nerve excitability enhancement, the night dry cough is more severe.
3. pharyngitis: pharyngeal mucosa inflammation, mucosal congestion and edema, feeling of foreign body sensation in the pharynx, resulting in patients often have cough symptoms, the vagus nerve tension increases at night, resulting in the pharynx to the outside world to enhance the sensitivity to stimulation, stimulation of pharyngeal cough reflex, resulting in a more pronounced cough.
Patients found dry cough at night, may also be related to other diseases, it is recommended to go to the hospital in a timely manner, improve the relevant examination, to clarify the cause of the disease, and comply with the doctor’s instructions for treatment.