Lung nodule found again after lung cancer surgery may be a recurrence phenomenon, or it may be due to tuberculosis and other infections, or the growth of benign lung tumor. If lung nodules are found again after lung cancer surgery, if the nature of nodules is malignant, it is generally considered to be due to the recurrence of lung cancer disease and metastasis, and then the lung nodules can be single or multiple. Some post-surgery lung cancer patients have low immunity, therefore, infection may easily occur after invasion by pathogenic bacteria such as Mycobacterium tuberculosis, leading to the formation of inflammatory nodules or tuberculosis balls in the lungs, and the nodules will disappear after anti-inflammatory and anti-tuberculosis treatments in general. There are also some lung cancer patients with benign tumors such as stenoma growing in the lungs after surgery, which are also clinically manifested as nodular foci in the lungs, and the pathological results of the nodules can usually make a clear diagnosis. If lung nodules are found again after lung cancer surgery, it is generally recommended to go to the hospital as soon as possible for standardized diagnosis and treatment by professional doctors.