Small patchy shadow in the right lung tip indicates that there may be local inflammation, tuberculosis or malignant tumor, which is suspected to be caused by pneumonia, tuberculosis, lung cancer and other diseases. 1. Pneumonia: this disease is mainly caused by infection by pathogenic microorganisms, including bacteria, viruses, mycoplasma, parasites and so on. If it is caused by bacterial or mycoplasma infection, it can be spread through short-distance droplets. The patient will have cough, sputum, generalized pain, fatigue and other symptoms, through the examination of the right lung tip found the existence of small patchy shadow. 2. Tuberculosis: The causative organism of this disease is Mycobacterium tuberculosis, which can be transmitted through the respiratory tract through droplet transmission, and the common susceptibility factors include drug abuse, excessive alcohol consumption and low immunity. The disease is usually asymptomatic in the early stages, but the results of imaging tests show small plaques on the right lung tip. With the further development of the disease, patients will have hemoptysis, night sweats, cough, chest pain and other symptoms. 3. Lung cancer: the cause of this disease is not yet clear, and studies show that it may be related to smoking, air pollution, ionizing radiation, heredity, viral infection and other reasons. Common symptoms include cough, dyspnea, blood in sputum, etc. Relevant imaging results show small patchy shadow in the right lung tip. To summarize, it is recommended that the patient undergoes further relevant examinations to clarify the specific cause and cooperate with the doctor for active treatment.