老人肺部肿了可能是慢性阻塞性肺病、肺栓塞、肺结核、肺癌、肺脓肿等疾病的表现，这些疾病都可能导致肺部肿胀。建议尽快就医以确定具体原因并接受适当治疗。

1.慢性阻塞性肺病

慢性阻塞性肺病是由于长期吸烟、空气污染等原因导致气道炎症和气道阻力增加，进而引起呼吸困难、咳嗽等症状。

患者可以遵医嘱使用硫酸沙丁胺醇吸入气雾剂缓解病情。

2.肺栓塞

Pulmonary embolism occurs when blood clots form in the veins of the lower extremities and travel to the lungs, blocking blood flow and causing damage to lung tissue.Treatment for pulmonary embolism may include anticoagulation therapy to prevent further clot formation and thrombolysis to dissolve existing clots.

3.肺结核

Lung tuberculosis is caused by Mycobacterium tuberculosis infection, which can lead to coughing, chest pain, weight loss, and fever.Chronic obstructive pulmonary disease is typically treated with a combination of medications such as rifampicin and isoniazid.

4.肺癌

Lung cancer develops due to prolonged exposure to cigarette smoke or other carcinogens, resulting in abnormal cell growth that causes persistent cough, hemoptysis, and dyspnea.Surgery is often the first-line treatment for early-stage non-small-cell lung cancer.

5.肺脓肿

Pneumonia is an infection of the air sacs in the lungs, usually caused by bacteria or fungi, that can lead to the accumulation of pus and the development of a lung abscess.Antibiotics, such as penicillin or fluoroquinolones, are used to treat pneumonia.

针对肺部肿胀的情况，建议定期进行胸部X光或CT扫描以监测病情进展。同时，应避免吸烟和接触有害气体，保持良好的室内通风，有助于减少呼吸道刺激和损伤。