There should be no specific signs and symptoms for a month before a lung cancer patient dies, and almost all relevant clinical symptoms may occur. To give a few examples, for example, if a lung cancer patient develops brain metastasis and finally dies from it, it may be preceded by neurological signs such as dizziness, headache, phantom smell, and phantom vision. If it is because the trachea is compressed by the metastatic lymph nodes and finally dies of suffocation, frequent coughing, breathing difficulty gradually worsens, and even sputum cannot be coughing out will begin. If hemoptysis occurs due to the invasion of large blood vessels, there may be a small amount of hemoptysis, and then the amount gradually increases. We have also encountered patients with lung cancer who metastasized to the liver and eventually died of liver failure with jaundice and ascites. Therefore, there is no uniform sign, and all kinds of symptoms, from all systems of the body, may occur in the patient.