Coughing during the day and not at night may be related to environmental factors or may be caused by acute respiratory infectious diseases. 1. Environmental factors: When exposed to allergens during the day, such as pollen and willow flakes, allergic cough can be caused. When you go home and stay away from the allergens, it is manifested as no cough. 2. Acute respiratory infectious diseases: Respiratory tract infections caused by pathogens such as viruses or bacteria lead to respiratory tract inflammatory response, manifested as coughing, coughing up phlegm and other symptoms. Generally in the daytime respiratory secretions need to be excreted through coughing, can be manifested as daytime throat itching, cough and other symptoms. At night due to deep sleep airway sensitivity is reduced, can be manifested as no cough. Cough during the day and no cough at night can also be caused by other diseases, such as cough variant asthma, gastroesophageal reflux stimulated cough, cardiac insufficiency. If the symptoms are severe or if they persist without relief, you should go to the hospital in a timely manner to clarify the etiology and follow the doctor’s instructions for treatment.