Lung nodule 30mm is generally more serious, need to seek medical treatment in time, according to the results of the pathological examination, the doctor will formulate the treatment plan in time. If the diameter of the lung nodule is 30mm, its condition is more serious. If the average lung nodule is 8mm or more, it needs to be treated promptly, but the pathology results should be used as the gold standard for diagnosis. Even if benign, a nodule of 30mm may still compress the trachea, bronchus and lung tissues and require prompt treatment. Therefore, immediate treatment is recommended. Based on the results of the pathology examination, the doctor will clarify the nature and typology of the nodule. From there, a targeted treatment plan will be formulated, and even if it is benign, it needs to be removed in time. If it is a malignant tumor, which is still in the early stage of the disease, there is still a chance of surgery, and timely surgical resection should be carried out; if it is in the middle or late stage, symptomatic treatment is the mainstay. Therefore, it is recommended to consult a doctor in time, subject to the doctor’s opinion, and follow the doctor’s instructions for treatment.