The main causes of sputum, yellow sputum and sticky sputum: 1. It is likely that the patient is suffering from lung disease, so he should go to the hospital for consultation and treatment in time, and do routine blood test or take chest X-ray to understand the degree of lung inflammation. 2. Infection caused by Staphylococcus aureus, which leads to symptoms of sputum and sticky sputum, can use cephalosporin or amoxicillin and other drugs for anti-infection treatment, and use amoxicillin hydrochloride to 3. the patient may suffer from bronchitis due to viral or bacterial infection. 4. the patient may suffer from phlegm, yellow and sticky phlegm due to pharyngitis.