Allergic rhinitis cough at night, usually because of the backflow of nasal mucus stimulation of the pharynx and thus cough symptoms, or because of the airway hyperreactivity caused by cough variant asthma.
1. In allergic rhinitis, chronic inflammation of the nasal mucosa stimulates the nasal mucosa for a long period of time, leading to an increase in the amount of mucus secreted by the nasal mucosa, and during the daytime, the nasal mucus is blown out of the nasal cavity with the help of external forces. At night when you sleep, the vagus nerve excitation, will lead to the expansion of the capillaries of the nasal mucosa, nasal secretion increased, and at the same time the position changes, the nasal cavity in the upper, the pharynx is in the lower, resulting in the backflow of snot to the pharynx, thus causing cough.
2. Patients with allergic rhinitis often suffer from airway hyperresponsiveness, which leads to coughing at night, mainly dry cough.
It is recommended that patients with allergic rhinitis, cough at night, go to the hospital under the guidance of the doctor to further improve the examination, a clear diagnosis and then professional treatment, so as to improve the symptoms of coughing at night in bed.