Lung solid nodule 7mm is not necessarily lung cancer, but if it is malignant, it belongs to stage I lung cancer. Lung solid nodule 7mm is relatively small in diameter, and lung nodules are benign and malignant. If it is a benign single solid nodule with the size of 7mm, it is generally recommended to follow up the patient between 6~12 months, and no surgical treatment is needed for the time being, and at this time, the solid lung nodule does not belong to lung cancer. However, if the nodule is malignant and the size is 7mm, it usually belongs to stage I lung cancer, which is the early stage of lung cancer. At this time, timely surgical resection treatment should be carried out, which mainly includes thoracoscopic pulmonary wedge resection or segmental resection. To prevent further growth or metastasis of the nodule, the prognosis of patients is generally better after early resection. It is suggested that patients should consult doctors in hospitals according to their own conditions, clarify the type as well as the stage under doctors’ guidance, and choose appropriate treatment for treatment.