Sinus air pressure injury is a sinus mucosal injury and inflammation caused by the negative pressure in the sinus and the external air pressure cannot be balanced in time when the external air pressure changes rapidly. X-rays can help in the diagnosis of sinus pneumonia, which can be seen as thickening of the mucosa, clouding of the sinus cavity, sometimes a fluid plane, and a semicircular shadow when there is a submucosal hematoma. X-ray radiographs for sinus pneumatic injuries are as follows: Normal range: 1. Radiographs can be used to observe lung, pleura, mediastinum and heart, large vessel lesions, bone fractures and joint dislocations of the extremities. 2.It can be used for the diagnosis of soft tissues of the extremities, oesophagus and opaque foreign bodies of the gastrointestinal tract. 3, abdominal plain film can understand the presence of pneumoperitoneum after gastrointestinal perforation and the presence of intestinal obstruction. Introduction to the examination: General radiographs can be taken for cranial films, chest films, abdominal plain films, and bone and joint films of the extremities. Clinical significance: Radiographs play an important role in diagnostic work and have the following advantages compared with fluoroscopy: 1. The image of the examined area is permanently preserved on the film, which can be used for analysis, discussion and review for comparison. 2.It can be preserved as scientific research data. 3.Fluoroscopy can show the microstructure, such as 2mm or more of the early source of disease is clearer than fluoroscopy. 4.Fluoroscopy can examine thicker parts of the body and make the patient receive less X-rays.