A right lung micronodule is a nodule smaller than 5mm. A right pulmonary micronodule is a dense shadow less than 5mm in diameter that occurs in the right lung. It is usually found incidentally during a high-resolution CT or X-ray examination of the chest, and may be associated with bacterial pneumonia, tuberculosis, or fungal infections, pulmonary sarcoidosis, vasculitis, and other diseases. Micro nodules with nodules smaller than 5mm generally require regular follow-up. If they gradually increase in size beyond 6 to 8mm, and have early lung cancer manifestations such as lobulation, short burr, pleural depression, etc., then they need to undergo further enhancement of CT, sputum exfoliative cytology culture, pathological biopsy, etc., in order to clarify the nature of the nodules. Therefore, once a tiny nodule is found in the right lung, it is recommended to consult a doctor to make a follow-up plan or treatment plan according to the symptoms and other symptoms, and if there is a change in the condition, it is recommended to improve other tests in time.