How long a 25 year old with 4mm lung nodules can live cannot be generalized, it depends on whether the lung nodules are benign or malignant. Benign lung nodules generally have no effect on life expectancy. 86% of patients with malignant lung nodules die within 5 years of diagnosis, while 15% of patients with limited lesions at diagnosis have a 5-year survival rate of 50%. Lung nodules that are benign can be followed up regularly and do not affect life expectancy. If they are malignant or transform into malignant tumors during follow-up, the survival time is related to the clinical stage, type of pathology, treatment method, and physical condition. Generally speaking, the earlier the disease is detected, diagnosed and treated, the less impact it has on life expectancy. It is recommended that patients undergo regular treatment in a timely manner. When the diameter of short-term pulmonary nodules increases during follow-up, the nodule pattern is lobulated or has a burr sign, and the nodule appears to have a solid component or an increase in the solid component, the possibility of malignant nodules is considered to be high. It should be noted that malignant nodules can be detected early, diagnosed early and treated early to improve the prognosis of the disease and reduce the adverse effects of the disease, and many patients can work and live as normal after treatment. It is recommended that patients who find lung nodules should follow up regularly and take active treatment as prescribed by their doctors.