Whether lung atrophy is dangerous or not depends on the size of the lung atrophy. Focal lung atrophy is usually not dangerous, while large lung atrophy can affect the health and life of the organism. If the symptoms are more severe, it can be life-threatening when the patient experiences breathing difficulties. Lung atrophy refers to the partial absence or complete absence of gas into the lung tissue, resulting in atrophy of the lung tissue, belonging to a kind of lung ventilation disorder. It is usually characterized by symptoms such as dry cough, chest tightness, shortness of breath, and difficulty breathing. The causes of lung atrophy mainly include bronchial obstruction, lung inflammation caused by atelectasis, pneumothorax, large amount of pleural effusion, tuberculosis or bronchial dilatation leading to destruction of lung tissues, lung space-occupying lesions compression of the lungs, the chest cavity will accumulate gas, liquid or solid, resulting in a change in the air pressure in the chest cavity, leading to inflammation to stimulate the lung parenchyma granulomatous tissue hyperplasia. In addition, lung trauma or congenital dysplasia may lead to lung atrophy. Patients with focal pulmonary atrophy may have no obvious symptoms and may not require treatment if the lesions are old. If there is a combination of symptoms, the condition can be controlled according to the cause of the disease, e.g., by taking medications such as roxithromycin and levofloxacin as prescribed by the doctor. Severe pulmonary atrophy patients may lead to a serious decline in lung function, patients with chest tightness, shortness of breath, dyspnea and other symptoms, the need to use surgical treatment. In conclusion, it is recommended that patients with pulmonary atrophy seek medical attention in a timely manner to identify the cause of the disease and treat it, and if necessary, adopt surgical treatment.