There are many causes of coughing at noon every day, you can consider cough variant asthma, chronic pharyngitis, gastroesophageal reflux disease and other diseases. 1. Cough variant asthma: cough variant asthma can have symptoms of paroxysmal cough, if the midday meet cause the occurrence of cough allergens, will cough. Patients can observe whether there is any change in the sensitizing factors within the time point of the beginning of coughing, etc. If there is, it should be determined and reduce the contact with the allergens, etc., and can go to the hospital for further examination and confirmation. 2. Chronic pharyngitis: Chronic pharyngitis can also be characterized by frequent irritating cough, which may be accompanied by nausea. 3. Gastroesophageal Reflux Disease (GERD): GERD is mostly characterized by reflux and heartburn, but there can also be extra-esophageal symptoms such as cough and throat discomfort. Cough may be caused by reflux irritation of the throat after lunch. If you cough every day at noon, you should go to the local hospital to complete the relevant examinations and further treatment after a clear diagnosis.