Small nodules in the lungs 5mm may be in need of treatment, but not absolutely, depending on the morphology of the lung nodules and the presence or absence of relevant clinical symptoms to consider the follow-up treatment plan. In recent years, due to people’s attention to health and the improvement of living standards, health checkups are rising year by year, so more small nodules in the lungs have been found. Most people are still worried about the occurrence of malignant diseases. In fact, most lung nodules are benign diseases and most people do not have any discomfort, so they can be observed and regularly reviewed. Isolated nodules with irregular morphology and ground-glass shape are recommended to be treated more cautiously because the chance of malignancy is relatively high, and early treatment is recommended for a better prognosis.