In case of smoking, sputum and cough, the first step is to quit smoking, after which the cough and sputum symptoms will all be significantly relieved. If the patient has heavy coughing symptoms, he can take oral cough medicines, such as compound licorice tablets, strong loquat, suhuang cough capsules, dextromethorphan, pentoxifylline, lung power cough combination, etc. If the patient cannot cough up phlegm, he can use expectorant drugs, such as Ambroxol, eucalyptus pinene, acetylcysteine, etc. Meanwhile, if the patient has yellow sputum and low fever, it is not excluded that there is pathogenic bacterial infection, so it is necessary to actively consult the doctor and further improve the blood routine, C-reactive protein, chest X-ray and other related tests. If the patient has bacterial infection, antibiotics can be used for treatment, and if the patient has atypical pathogenic infection, macrolide antibiotics or quinolone antibiotics can be used.