Lung adenocarcinoma surgery for more than a year and shortness of breath may be caused by low gas exchange area of the lungs, which does not need medication, and the patient needs to adjust the living habits. Secondly, shortness of breath is also considered to be caused by pneumonia, patients can take antibiotics such as amoxicillin and erythromycin. Lung adenocarcinoma patients may have their lung lobes removed during surgery, which will lead to the reduction of the area of effective alveoli in the lungs for gas exchange, and the patients will suffer from reduced lung function, which will cause chest tightness, shortness of breath and other manifestations. For shortness of breath caused by the reduction of alveolar exchange area due to lung resection, medication or other treatments can be avoided, and patients need to increase their lung capacity every day by exercising, speaking loudly or coughing. If the shortness of breath in lung adenocarcinoma patients more than one year after surgery is caused by pneumonia, patients need to take medicine for the type of pneumonia. If the patient develops Streptococcus pneumonia can use antibiotics such as amoxicillin clavulanate potassium and cefixime under the guidance of doctor. For patients who develop Mycoplasma pneumonia, macrolide antibiotics such as erythromycin and azithromycin are needed. Lung adenocarcinoma patients more than a year after the operation, but also appear shortness of breath performance need to timely consult a doctor, you can choose the appropriate measures under the guidance of the doctor for treatment.