Coughing after radiotherapy is often caused by two reasons: 1) radioactive pneumonia, which can cause pulmonary fibrosis after chest radiotherapy, resulting in radioactive pneumonia, at this time, anti-inflammatory, phlegm and asthma treatment, herbal treatment, local heat therapy and hormone therapy should be performed; 2) non-radioactive damage, but other non-thoracic radiotherapy combined with respiratory tract infection cough, at this time, antiviral or anti-bacterial, anti-mycoplasma anti-inflammatory treatment should be performed, as well as anti-sputum and cough treatment. At the same time, symptomatic treatment of phlegm and cough can be carried out, and if necessary, nebulized inhalation medication can be administered. To sum up, if you have a strong cough after radiotherapy, you should actively identify the cause of the cough and take appropriate treatment according to the cause of the cough.