New crown generally refers to new crown pneumonia. Cough as one of the clinical manifestations of new crown pneumonia is difficult to diagnose and treat clinically because of the complex and diverse occurrence of the disease, whereas common cough is mostly seen in respiratory diseases, where the etiology is mostly verifiable and a basis for clinical treatment exists. For the difference between the two, the following aspects should be analyzed: 1. Causes: New crown pneumonia cough is often caused by damage to lung tissues and affected respiratory tracts after infection with the new crown virus, etc. There is a relevant epidemiological history. Common cough is often caused by inflammatory stimulation of the respiratory tract, such as colds or bronchitis, and is a protective reflex of the respiratory system. 2. Symptom characteristics: New coronavirus cough is often dry with accompanying symptoms such as fever, malaise and diarrhea. In contrast, ordinary cough fever is relatively rare and mostly low-grade fever, often coughing up white or yellow pus sputum, which may also be accompanied by itchy throat, sneezing, shortness of breath, etc. depending on the cause; 3. severity of the condition: usually, patients with neoconiosis cough have respiratory distress, shock and other related symptoms, which can even be life-threatening, while ordinary cough generally does not appear in the above situation; 4. infectiousness: neoconiosis Patients with pneumonia have a more contagious cough, while ordinary cough is relatively less contagious; 5. Nucleic acid test results: patients with neo-coronary pneumonia cough have positive nucleic acid test results, while patients with ordinary cough with the same nucleic acid test have negative results; 6. CT test results: the signs of neo-coronary pneumonia cough on CT are predominantly ground glass lesions, and the progressive lesions increase and out of reality, showing “shattered stone sign”, and the lesions in the severe stage may show an anti-pteroidal distribution with pleural effusion. Chest radiographs of common cough generally present only as increased lung texture with coarse texture or present patchy shadows, which require further examination to determine the cause.