Sinusitis sleep at night cough particularly strong, most of the secretion stimulation, but not except with open-mouth breathing, parasympathetic excitation, allergies, gastroesophageal reflux and so on. It is recommended to go to the hospital otolaryngology department, identify the cause of the disease and follow the doctor’s instructions for treatment. 1. Stimulation of secretion: when sinusitis patients sleep at night, nasal secretion backflow into the throat will cause local stimulation, which will cause irritating cough. 2. Open-mouth breathing: rhinitis patients with nasal mucosa congestion and edema, increased secretions, may cause nasal congestion. When you sleep with your mouth open at night, the dry air will cause irritation to the throat area, which may cause coughing. 3. Parasympathetic nerve excitation: when sleeping at night, the body’s parasympathetic nerve excitation, so that the respiratory tract in the thin phlegm gathered more, these substances stimulate the respiratory tract and cause cough. 4. Allergy: variant asthma can appear at night coughing symptoms, mostly induced by allergens. 5. Gastroesophageal reflux: In gastroesophageal reflux disease (GERD), gastric contents reflux into the throat, irritating the local mucous membranes and giving rise to symptoms such as cough. Sinusitis patients sleep at night when the cough is particularly strong, it is recommended to go to the hospital as soon as possible to the otorhinolaryngology department, under the guidance of the doctor’s treatment, can help relieve the symptoms of cough.