No cough at night, dry cough during the day, the main consideration for acute pharyngolaryngitis, acute trachea – bronchitis. 1. Acute pharyngolaryngitis: mostly caused by influenza virus, parainfluenza virus, mainly manifested as pharyngeal itching, pharyngeal burning sensation, pharyngeal pain is not obvious, and some patients may have a dry cough in the morning and less cough at night. 2. Acute trachea-bronchitis: usually acute onset, systemic symptoms are mild, may have fever. Patients begin with a dry cough or a small amount of mucus sputum, followed by increased coughing, occasionally with blood in the sputum, can also be accompanied by chest tightness and shortness of breath. The dry cough during the day without coughing at night can also be seen in lung cancer and other diseases, it is recommended that patients with the above symptoms go to the relevant departments of the hospital in a timely manner, under the guidance of a professional doctor, complete the relevant examinations, so as to clarify the diagnosis of the disease, and receive standardized treatment.