Bronchial asthma is primarily caused by inflammation in the airways due to various inflammatory cells, leading to the narrowing and spasm of the bronchi. This impedes the effective expulsion of gases from the lungs through the bronchi, resulting in a disease characterized by symptoms such as wheezing, shortness of breath, chest tightness, and coughing. In patients with bronchial asthma, because of a large amount of gas remaining in the lungs, X-ray manifestations primarily include sparse lung markings, increased translucency, as well as some signs of widened intercostal spaces and lowered diaphragm. Generally, these signs are not specific and cannot be solely relied upon to diagnose or exclude bronchial asthma. It is also necessary to consider the patient's medical history and lung function tests for a comprehensive assessment.