Small dotted shadow in the right lung is the term used to describe the imaging results of chest CT or chest X-ray, which may be pneumonia, tuberculosis or inflammatory pseudotumor, early lung cancer and other diseases, and need to pay attention to timely consultation and symptomatic treatment. 1. Pneumonia: Pneumonia is usually caused by bacteria, viruses and other microorganisms, such as Streptococcus pneumoniae, influenza virus, etc. Typical symptoms are fever, cough and so on. Patients can be treated with cephalosporin antibiotics, such as cefazolin sodium, under the guidance of doctors. 2. Tuberculosis: Tuberculosis is usually caused by Mycobacterium tuberculosis infection, the typical symptoms are coughing, coughing sputum and hemoptysis. Patients can use isoniazid and other drugs under the guidance of the doctor for treatment. 3. Inflammatory pseudotumor: Inflammatory pseudotumor is a kind of chronic non-specific inflammatory changes, usually cough, fever, dyspnea and other symptoms. Patients can use drugs such as methylprednisolone under the guidance of doctors for treatment. 4. Early lung cancer: Lung cancer is a primary malignant tumor of lungs, the cause of which is still unclear and may be related to smoking, occupational exposure, air pollution, ionizing radiation, diet and physical activity, heredity and other factors. Early stage lung cancer usually has no obvious symptoms. Early-stage lung cancer is treated by surgery, chemotherapy, biotargeting and radiation therapy with a view to achieving eradication or maximum control of the tumor and improving the cure rate. When doing lung examination, the physical examination result of small dot-like shadow on the right lung as the basis is not able to directly determine the type of the disease effectively, and one should consult the doctor in time to clarify the cause of the disease and carry out targeted treatment if necessary.