Smoking more than a cough for six months should first quit smoking, such as the combination of cough and phlegm patients, can take cough and phlegm drugs. At the same time, need to improve the examination, clear whether there is smoking caused by chronic pharyngitis, chronic bronchitis, or other diseases that cause cough. If there is a combination of related diseases, it is necessary to treat the cause of the disease. Cough and phlegm symptoms are mainly due to the fact that cigarettes contain carbon monoxide, nicotine and other harmful chemicals, which can irritate the airways and cause coughing. Smoking also leads to shortening of the cilia of the bronchial mucosa and hyperplasia of the mucous glands, which affects the function of cilia clearance and leads to increased mucous secretion. It is necessary to actively quit smoking. If you have phlegm that is not easy to cough up, you can take aminoglutethimide and other drugs to reduce phlegm. Long-term smoking can also lead to other diseases, coughing and sputum symptoms. For example, chronic pharyngitis, can be given to improve the symptoms of borax solution. If chronic bronchitis, azithromycin can be given in the acute stage to fight infection, and Ambroxol can be given in the stable stage to resolve phlegm. If the destruction of the respiratory barrier function, easy to cause respiratory infections, if the basis of bacterial infection, can take cefixime and other antibiotic treatment. Recurrent cough is not always related to smoking, but can also be caused by other diseases, such as cough variant asthma. If the symptoms are not relieved or aggravated, it is necessary to go to the hospital in time, after clarifying the cause of the disease to take targeted treatment.