Irritating cough should first see respiratory medicine, cough is one of the common clinical manifestations of respiratory diseases, cough can usually be divided into two categories: First, chest CT examination has obvious lesions of disease, such as tuberculosis, lung tumors, pneumonia, etc.; Second, chest CT does not have a clear manifestation of the disease, if this type of disease cough time more than 8 weeks is called chronic cough, which is one of the common reasons for respiratory medicine consultation. Common causes of chronic cough are cough variant asthma, gastroesophageal reflux cough, upper airway cough syndrome, chronic eosinophilic bronchitis, of course, bronchial foreign body and other diseases can also cause cough. In addition to respiratory diseases, cardiovascular and digestive diseases can also cause cough, but the most common cause of cough is respiratory disease, so cough should first see the respiratory medicine.