Morning sputum is mostly seen in chronic rhinitis, chronic pharyngitis and chronic obstructive pulmonary disease. The formation of sputum is mainly caused by the contact of respiratory secretions and exudates with dust and dirt in the air. Patients with long-term respiratory tract infections have relatively more respiratory secretions and exudates, which are more likely to appear especially after getting cold and flu. Therefore, if you have more sputum in the morning, you should consider the presence of chronic respiratory diseases, and you need to do further chest imaging examinations, including chest X-ray and chest CT, and you can also do allergy detection index examinations, including bronchial excitation test, bronchial diastolic test and exhaled breath nitric oxide test. If the above indexes are significantly higher you need to consider respiratory allergic diseases. Due to bronchial allergy, vagus nerve excitation and bronchial constriction for poor sputum excretion, it is easy to cause cough and sputum aggravation in the morning, so bronchial asthma patients are more likely to have more sputum in the morning. Patients with chronic obstructive pulmonary disease who have smoked for a long time will have significantly more sputum due to the weakened cilia oscillation after a night’s rest, and the cilia oscillation will be accelerated in the morning when they get up, and the sputum will be expelled outward from the lungs, and the sputum will be significantly reduced during the day after the morning sputum.