How to determine if it's white lung

Generally speaking, "white lung" is a term used to describe a specific finding in lung imaging. Whether a patient has white lung can be determined through imaging examinations and clinical symptoms. If discomfort occurs, it is recommended to seek medical attention promptly. The detailed analysis is as follows:

From the perspective of imaging examinations, chest X-rays and chest CT scans are the primary diagnostic tools. Normally, healthy lungs appear black on X-ray and CT images because they are filled with air, which absorbs less radiation. In contrast, "white lung" appears as large areas of white shadows in the lungs due to infiltration by inflammatory exudates, mucus, blood, or other substances that increase radiation absorption, making the lung tissue appear whiter. When such white changes affect multiple lung lobes—especially when most areas of both lungs are involved—"white lung" should be highly suspected.

From a symptomatic standpoint, patients with white lung typically experience severe breathing difficulties, rapid and labored breathing, and shortness of breath even at rest. They often have persistent coughing, increased sputum production, and changes in sputum characteristics—for example, shifting from clear or white mucus to yellow, pus-like phlegm. Other possible symptoms include fever and chest pain. Blood oxygen saturation levels are usually significantly reduced, commonly dropping below 93%, which can be monitored using a home fingertip pulse oximeter. In severe cases, continuous oxygen support may be required to maintain adequate oxygen levels. However, a definitive diagnosis of white lung requires physicians to integrate the patient's medical history, symptoms, physical signs, and comprehensive test results.

In daily life, it is important to get adequate rest, ensure good indoor ventilation, follow medical advice for treatments such as oxygen therapy, undergo regular follow-up examinations, and seek prompt medical care if any abnormalities occur.