A faint shadow with few spots and nodules in the right lower lung is a confined shadow with increased density that can be seen on imaging of the lungs. It is commonly seen in infectious diseases, such as pneumonia and tuberculosis, and can also be seen in lung tumors. 1. Pneumonia: Pneumonia is mainly caused by pathogens causing lung inflammation, often with fever, coughing and other symptoms, mainly in children and the elderly and other people with relatively low immunity, usually after anti-infective treatment, the shadow can be significantly reduced or disappeared. 2. Tuberculosis: Lung infection mainly caused by Mycobacterium tuberculosis, often with symptoms such as low-grade fever, night sweats, cough, sputum, blood in sputum and hemoptysis. 3. Lung tumor: Lung tumor includes benign and malignant tumors, which are mainly related to smoking and other bad habits and environmental and genetic factors, and may have no clinical symptoms in the early stage, and chest pain and cough are common in the late stage. There are a few spots and nodular fuzzy shadows in the right lower lung, which may also be seen in other diseases, and need further relevant laboratory tests and examinations, and should be standardized under the guidance of the doctor’s treatment.