Dry cough without fever is not necessarily new coronavirus pneumonia. In patients with allergic pharyngitis, allergic rhinitis, bronchial asthma, or chronic wheezing bronchitis during the current winter and spring seasons, irritating paroxysmal dry cough is easily caused, which is considered to be related to allergic factors, and is also associated with airway hyperresponsiveness. The typical symptoms of novel coronavirus pneumonia are fever, malaise, and dry cough, but the diagnosis of novel coronavirus pneumonia cannot be based solely on one symptom, as there are also asymptomatic infected patients, and the diagnosis requires a comprehensive consideration of the epidemiological history, as well as nucleic acid testing and chest CT results.