Infectious lesions in the right upper lung are not necessarily tuberculosis, but may be secondary to pneumonia or a lung-occupying lesion. Infectious lesions in the right lung are not necessarily tuberculosis, but may also be pneumonia caused by other bacterial or viral infections of the lungs. Therefore, the clinical diagnosis of right lung infectious disease should be based on the patient’s medical history, clinical manifestations, and some relevant auxiliary examinations to diagnose what causes right lung infectious lesions. If the right lung infectious lesion cannot be diagnosed, empirical anti-pneumonia treatment can be used, and chest CT can be repeated, if the lesion disappears, it can be roughly judged to be pneumonia. If there is cough and sputum, sputum culture and sputum antacid bacillus examination can be perfected, and further diagnosis can be made according to the examination results. In addition, if there is a lung-occupying lesion blocking the bronchus in the right upper lung, it may be secondary to infection. In this case, the lesion will shrink after anti-infective treatment but will not disappear completely, and the diagnosis can be clarified by lung puncture of the residual lesion and combined with pathologic examination. Patients who find infectious lesions in the right upper lung need to consult a doctor in a timely manner, under the guidance of the physician for further examination, treatment after a clear diagnosis, and pay attention to follow-up, do not delay. In daily life should pay attention to rest, it is recommended not to smoke, stay up late and drink alcohol.