Nodular dense shadows in the upper lobe of the right lung are mostly found in benign lesions such as pneumonia and tuberculosis, or malignant lesions such as lung cancer, which can be pathologically detected to determine the nature of the nodules and then treated according to the cause and symptoms. 1. Benign lesions: CT examination of lungs of patients with pneumonia or tuberculosis can find nodular dense shadow in the upper lobe of lungs. If there is no change for a long time or the change is slow, mainly due to local inflammation stimulation, the patient can follow the doctor’s instructions according to the specific condition, the type of pneumonia to use penicillin, prednisone and other drugs to infuse treatment, or injection of gammaglobulin to improve the symptoms. If it is caused by tuberculosis, patients can take oral anti-tuberculosis drugs, such as isoniazid, ethambutol and so on, as recommended by the doctor. If the disease is serious, chemotherapy, surgery and other methods can also be chosen. 2. Malignant lesions: mostly seen in lung cancer, which is a primary malignant tumor of the lungs. The specific cause is not clear, and is generally believed to be related to diet, heredity, smoking and other lung diseases. Early symptoms are mainly characterized by bouts of irritating dry cough, and hemoptysis, dyspnea and other symptoms may appear as the disease progresses. Individualized treatment is needed according to the specific type and stage of lung cancer, and available treatments include molecular targeted therapy and other drug treatments, surgical treatments, radiotherapy and chemotherapy, etc., and multiple methods can be applied in combination. If nodular high-density shadow is found in the upper lobe of the right lung, it is necessary to find out the cause of the disease in time, do the treatment according to different causes, and listen to the doctor’s diagnosis and treatment advice.