Yellow sputum in the throat in the morning is due to inflammation in the throat, especially inflammation of the throat caused by bacterial infection, which leads to the secretion of inflammatory exudates and the gathering of neutrophils in the throat to devour these foreign bacteria, resulting in the production of yellow sputum. During the daytime, the yellow phlegm in the throat is less because it enters the digestive tract with the swallowing action or food. At night, the swallowing action will be much less, and the yellow phlegm will gather in the throat, and the sputum will be excreted in the morning after getting up. It is mainly necessary to carry out some antibiotic treatment. For inflammation of the upper respiratory tract, cefradine, cefalexin or amoxicillin are more commonly used for treatment. If there is no allergy to these drugs, it is fine to take them directly. If there is an allergy to these drugs, azithromycin can be used as an alternative treatment.