Dry cough may be caused by lung problems or upper respiratory tract disease, and should be clinically diagnosed in conjunction with other symptoms and relevant tests. Most dry coughs are caused by inflammation in the throat, such as tonsillitis and chronic pharyngitis, and can also occur with bronchitis and mycoplasma pneumonia. Clinically, CT, chest X-ray and even bronchoscopy can be used as a basis for diagnosis. It can be treated by nebulized inhalation, which helps to correct the inflammation in the airway and helps to expel the phlegm, which is helpful for the improvement of the disease, and the reasonable choice of antibiotics is also beneficial for the disease.