Lung infections are generally defined as infectious inflammation of the lung parenchyma, which can be found in all three parts of the terminal airways, alveolar cavities, and interstitium. Lung infections are mostly due to infections such as mycoplasma, viruses, bacteria and fungi. Pneumonia is characterized by cough, sputum, chest pain and fever. Blood routine, C-reactive protein, chest X-ray, chest CT and other items can be examined, and after diagnosis, it is necessary to strengthen the anti-infection, symptomatic antipyretic and analgesic, cough and phlegm treatment. Bacterial infections need to take antibiotics as prescribed, such as amoxicillin, and viral infections can be improved by resting and taking ribavirin if necessary. In addition, you need to take drugs to dissolve phlegm, such as ambroxol hydrochloride. Drink plenty of fluids, eat a well-balanced diet, and exercise to boost your immune system. Abstaining from smoking and alcohol will help prevent lung infections. Patients with lung infections are advised to seek prompt medical attention, undergo tests, and then be treated under the guidance of a doctor.