Some lung cancers will have this irritating dry cough, which is also a typical clinical manifestation of lung cancer, usually an uncontrollable paroxysmal violent cough, which may be different from some other coughs caused by pneumonia. After anti-inflammatory, asthma, cough relief and phlegm treatment, the improvement of this irritating dry cough is not obvious. Because the tumor may grow larger and compress the pleura or nerves, or the tumor invades the trachea, causing this irritating dry cough, further anti-tumor treatment is needed. If the tumor lesion in the lung can be reduced, it may be able to relieve the symptoms of nerve compression and the dry cough. In addition, some strong cough suppressants, such as codeine, a central cough suppressant, can be considered. For irritating dry cough, it may also be effective, but only if there is no sputum, and if there is more sputum, it cannot be used.