If you have a sudden, violent cough, look for the cause of the cough. A sudden, violent cough can occur when you are exposed to irritating gases. If the symptoms are severe, oral cough suppressants such as dextromethorphan and compound licorice combination can be used in moderation. If the foreign body is small, the foreign body can be coughed out by coughing. If it cannot be coughed out, the foreign body should be removed by bronchoscopy in the hospital, and effective antibacterial drugs should be used to prevent infection. If the cough is severe and accompanied by a large amount of phlegm, active treatment with cough suppressant and phlegm-eliminating drugs is required.