The treatment is as follows: 1. For mild lung infections, the doctor should only give some advice, use antibiotics and go home to maintain nutrition. 2. For moderate to severe lung infections, the patient should be actively hospitalized, put in bed, keep the air fresh in the room, maintain appropriate temperature and humidity, and give rehydration to maintain water, electrolyte and acid-base balance for patients with fever and shortness of breath. 3. 4. Patients with high body temperature should be given cooling agents to avoid inducing or aggravating heart failure, acute coronary insufficiency, etc. Avoid giving high doses of antipyretic and analgesic agents, if the patient is sweating profusely, there will be deficiency shock. 5. Patients with cough, cough and shortness of breath should be given cough and wheezing expectorants to help release bronchial spasm, dilute phlegm and promote phlegm discharge. 6. Patients with more intense cough should avoid using strong cough suppressants.7. Patients with thick sputum and difficulty in coughing up sputum should be given nebulizer inhalation treatment, turn the patient, pat the back, and postural drainage to keep the airway open.8. Patients with hypoxemia should be given oxygen, improve their nutrition, and correct their underlying diseases such as diabetes, coronary heart disease, hypertension, etc. Patients should be encouraged to move properly and pay attention to laxation, which can reduce the occurrence of venous thrombosis or pulmonary embolism in the limbs. With regular treatment, most pulmonary infections in the elderly can be controlled.