Coughs caused by aspiration of foreign bodies are clinically distinguished from ordinary coughs by the following aspects: 1. The cough with a foreign body in the trachea is a sudden choking cough with a previous history of foreign body inhalation, which results in acute symptoms of wheezing, shortness of breath, or even asphyxia. A common cough usually has preexisting symptoms, such as infection by pathogens due to cold or rain, and a drop in immunity, which leads to a gradual and slow aggravation of coughing and coughing, with less obvious wheezing and shortness of breath.2. Taking X-rays or CT of both lungs for tracheal foreign bodies can reveal obvious shadows of inhaled foreign bodies, and a common cough can be seen as thickening and blurring of the lung texture in bronchitis or pneumonia, or The shadows of inflammatory lesions of corresponding infections.