Diffuse airway inflammation in both lungs is the presence of inflammation in the trachea and bronchi, and requires a combination of medical history and ancillary tests to determine the cause and condition. Diffuse airway inflammation in both lungs is a common term used in lung imaging to describe inflammatory changes in the trachea and bronchi. However, the presence of such lesions is only visualized on imaging, and the cause and type of infection cannot be determined, so it is only referred to as inflammation. If diffuse airway inflammation is found in both lungs, specialist care is needed to further evaluate the condition.