Invasive lung cancer generally refers to invasive lung adenocarcinoma, whether it is serious or not needs to be decided according to the specific stage of invasive lung adenocarcinoma as well as the patient’s own health condition, etc. It is recommended to consult a doctor in time to determine the current stage of the disease in order to guide the follow-up treatment. If invasive lung adenocarcinoma patients’ lesions are small in size, no metastasis has occurred, the staging is early, and the patients can tolerate the surgery, and the postoperative recovery of the patients after the surgical treatment is still good, then the disease is not considered serious. However, if the invasive lung adenocarcinoma lesion is large in size and has already developed distant metastasis, it will cause serious symptoms such as dyspnea, panic, liver function decline, liver insufficiency, etc. At this time, the patient usually loses the chance of surgery, which is a bit more serious than before. Invasive lung adenocarcinoma needs to be treated in hospital immediately no matter whether the condition is serious or not. It is recommended that patients should not smoke and drink during the treatment period, ensure sufficient sleep quality, and eat a light diet, avoiding spicy and stimulating food to avoid aggravating the condition.