The symptoms of coughing up yellow sputum in the morning may be caused by the following factors: 1. The symptoms of coughing up yellow sputum in the morning may be caused by chronic pharyngitis and pharyngitis, and the patients usually have a foreign body feeling in the throat, cannot spit it out, cannot swallow it, etc. 2. The patient may have coughing yellow sputum in the morning, accompanied by coughing and different degrees of fever, etc. 3, the patient usually suffers from chronic diseases of the respiratory system, clinically it is more common to have bronchial dilatation, usually accompanied by coughing blood and other symptoms, clinically it can also be seen in chronic bronchitis, tuberculosis and other diseases, it is recommended that the patient go to the hospital for chest X-ray or CT examination in order to clarify the cause.