It is recommended to consult a doctor as soon as possible to find out the specific causes and standardize the treatment under the guidance of a physician. 1. Lung infection: When the lung infection is serious, it may cause the patient to lose his breath. In this case, oxygen can be given first, and when carbon dioxide retention exists, low-flow oxygen can be given. In the absence of carbon dioxide retention, the oxygen concentration can be increased and injectable sodium methylprednisolone succinate can be given to reduce the inflammatory response and dilate the bronchial tubes. Sensitive antibiotics can also be given for anti-inflammatory treatment, such as azithromycin, roxithromycin and other drugs, which can relieve the symptoms of breathlessness; 2. Pulmonary embolism: If the patient cannot breathe due to pulmonary embolism, he should go to the hospital for blood gas analysis as soon as possible, and oxygen therapy. Anticoagulant drugs, such as low molecular heparin, warfarin, etc., can be used under the guidance of the doctor for anticoagulation therapy, and urokinase, streptokinase and other drugs can also be used for thrombolytic therapy. After the pulmonary embolism is lifted, the symptoms of breathlessness can be relieved. 3. coronary heart disease: elderly people with coronary heart disease may also suffer from breathlessness, which can be treated with drugs such as Rosuvastatin, Simvastatin, aspirin and nitroglycerin. For the more serious can be surgical treatment, such as percutaneous coronary intervention, coronary artery bypass grafting, etc.; 4, asthma and chronic obstructive pulmonary disease: asthma in the elderly will lead to shortness of breath, can be given budesonide, dexamethasone and other drugs nebulized inhalation, combined with salbutamol, terbutaline and other drugs to dilate the bronchial tubes, while giving anti-cholinergic drugs, such as ipratropium bromide, combined with loratadine, etc. medication to relieve the symptoms of shortness of breath. There are many reasons why an elderly person may not be able to breathe, so if you are unwell, it is advisable to go to a regular hospital as soon as possible to have the relevant examination and give treatment after clarifying the cause to avoid delaying the condition.