Solid 6mm lung nodules need to be followed up. Solid 6mm lung nodules have a risk of malignancy and therefore need to be followed up. Generally speaking, solid lung nodules up to 6mm do not need to be followed up. Solid 6mm nodules are at risk of malignancy, especially in high-risk groups such as long-term smokers, long-term chemical exposure, and patients with underlying lung disease. Real-time monitoring of the patient’s lung nodules is needed to prevent enlargement, malignancy or spread, so solid 6mm lung nodules need to be followed up. Patients with solid 6mm lung nodules should be followed up regularly, usually once every 1-2 years, to prevent malignant changes; for solid 6mm lung nodules with glassy nodules and fuzzy surroundings, the risk of malignant changes is greater, and it is recommended to follow up once every 6 months or so. It is recommended that patients should undergo appropriate examinations and treatments under the guidance of professional doctors according to their actual conditions.