Early stage of lung cancer is usually not easy to metastasize if it is treated in time. If patients do not receive timely treatment it will lead to progression of the disease and thus metastasis. The cause of lung cancer is not yet clear, mostly due to smoking, occupational exposure, environmental influence and other factors. Most of the patients with early stage lung cancer do not have serious symptoms, and if they seek timely medical treatment, their condition can be effectively controlled after timely and regular treatment, and metastasis is generally unlikely to occur. If early stage lung cancer patients do not seek medical treatment in time, their condition may deteriorate and metastasis may occur. Patients may have chest pain, hoarse voice, chest water and other symptoms after metastasis. Therefore, patients with early stage of lung cancer should be detected and treated as early as possible to avoid metastasis. Patients with early stage of lung cancer should consult doctor in time and take treatment measures according to doctor’s advice. Patients with early stage of lung cancer usually will not metastasize after treatment. If patients do not seek timely medical treatment, it may lead to deterioration of the condition and metastasis.