Cough from 12:00 pm to 1:00 pm mostly occurs due to respiratory infections and allergic diseases. Infectious diseases include rhinitis, pharyngitis, tonsillitis, bronchitis, pneumonia, and tuberculosis, while allergic diseases include allergic rhinitis and allergic bronchial asthma. Therefore, if coughing at night occurs, go for a chest X-ray or chest CT to further clarify the presence of lung diseases, as well as lung function tests and exhaled breath nitric oxide tests to understand the presence of respiratory allergic diseases, such as early bronchial asthma.