If the patient has more yellow sputum because of smoking, it may be a combination of bacterial infection, and the patient should actively seek medical advice and improve the blood routine, sputum culture, chest X-ray and other relevant examinations under the guidance of the doctor. If the patient’s blood routine suggests a corresponding increase in leukocytes, neutrophils, neutrophil percentage, C-reactive protein, calcitoninogen, it can be diagnosed as a bacterial infection, which needs to be treated with antibiotics, and the commonly used antibiotics include amoxicillin, cephalexin, roxithromycin, levofloxacin, and so on. Complete the sputum culture examination, and change antibiotics according to the drug sensitivity results at a later stage. If the patient has a lot of sputum and sticky sputum, expectorant drugs can be taken orally, such as aminoglutethimide, bromhexine, acetylcysteine, eucalyptus-pinocampus, and so on.