Cough every night, no cough during the day, common causes are cough variant asthma, bronchitis, allergic laryngitis.
1. Cough variant asthma: belongs to the special type of bronchial asthma, the reason why cough at night, cough during the day is not obvious, and the vagus nerve excitability at night to enhance the airway is more sensitive to have a certain relationship, there is generally no sputum or sputum is not much, mainly to stimulate the cough; especially easy to contact with the bedding, dust mites, and other allergens at night, so that the original condition of the attack or exacerbation.
2. Bronchitis: due to the relatively low temperature at night, coupled with the vagus nerve excitation, bronchial spasm, contraction, there will be obvious cough; in addition to the night into the sleep state, phlegm in the respiratory tract will be a large number of aggregation, in the secretion of the stimulation of the cough will also occur.
3. Allergic pharyngolaryngitis: allergic pharyngolaryngitis patients are often accompanied by allergic rhinitis, mainly manifested as nasal congestion and other symptoms, in the sleep state of the dry air directly stimulate the respiratory mucosa, it will be easy to show for coughing, itchy throat and other symptoms.
Coughing at night, not coughing during the day for many other reasons, such as dry air in the sleep environment, heart failure, etc., it is recommended that the symptoms in time, to the hospital to find out the reasons for the doctor’s orders to take targeted treatment.