There are many reasons for dry cough at night, and common causes include laryngitis, allergic pharyngitis, cough variant asthma, acute bronchitis, and so on. 1. Pharyngitis: Drinking less water at night during bedtime can easily lead to dryness of the throat, resulting in the symptoms of dry cough. 2. Allergic pharyngitis: mostly caused by heredity, pathogenic bacterial infection, environment and other factors, manifested as continuous irritating cough, pharyngeal foreign body sensation, etc., in daily life should pay attention to avoid contact with allergens. 3. Cough variant asthma: manifested as irritating dry cough, frequent and violent attacks, and more pronounced cough at night, this situation needs to be treated under the guidance of a doctor, and should not blindly take medication. 4. Acute bronchitis: usually nasal congestion, runny nose, cough, hoarse voice, sore throat and other manifestations, more irritation after inhaling cold air, dry cough is more pronounced, if accompanied by bronchospasm, need to follow the doctor’s advice, timely treatment. There are many other causes of dry cough at night, if the dry cough at night is more serious, you should go to the hospital in time to identify the cause of the disease, targeted treatment.