Pneumonia has been dry cough may be related to the following conditions: First, the formation of pneumonia by mycoplasma, chlamydia, legionella infection. Patients usually have irritating dry cough, cough degree is more violent, usually need to be effective antibiotics to fight infection, with the necessary cough medication, the dry cough can be gradually relieved. Secondly, patients with pneumonia have increased airway sensitivity due to inflammatory stimulation, which manifests itself as a post-infectious cough. Patients with such a dry cough need to use the leukotriene modulator montelukast sodium, or ketotifen to reduce airway sensitivity, along with the treatment of the cough. However, it should be noted that part of the dry cough of pneumonia is due to bronchial lesions that lead to irritating dry cough, such as bronchopulmonary carcinoma or endobronchial foreign bodies, etc. At this time, it is necessary to carry out a bronchoscopy to avoid misdiagnosis and omission of the diagnosis.