Most causes of morning cough are due to chronic pharyngitis, but chronic bronchitis, emphysema, and asthma should also be considered. The presence or absence of sputum is the main evidence to distinguish the cause of coughing. If there is only a dry cough and dry vomiting, you can observe whether the tonsils of the pharynx are enlarged, congested, red or swollen, which can be considered to be due to chronic pharyngitis. If you have a long-term cough, coughing sputum, the color of sputum is foamy, and the cause of coughing in the morning should be considered as chronic bronchitis, emphysema and other factors. The appearance of symptoms of dyspnea aggravated by coughing and coughing with unclear speech and breathlessness should be considered asthma. There are also common chronic diseases such as lung abscess and tuberculosis that are the main factors causing morning cough. Usually cough is considered to be caused by chronic pharyngitis in daily life. It is recommended to do a pharyngeal swab test at the clinic to see whether the causative organism causing the cause of cough is a common organism in the body or an exogenous infection of bacteria. If it is an exogenous infection of bacteria, it should be treated with effective antibiotics to relieve the symptoms of cough even if the cough is sputum-free.