The earliest parts of lung adenocarcinoma recurrence after surgery are in situ recurrence of lung gland, lymphatic metastasis (supraclavicular lymph node metastasis, cervical lymph node metastasis), brain metastasis and so on. 1. In-situ recurrence: lung adenocarcinoma patients recur in-situ after surgery, and the patients manifest cough, chest tightness, chest pain, or even dyspnea. 2. Intra-pulmonary recurrence: For example, when the lung adenocarcinoma is on the left side at the beginning, and then recurrence may occur on the right side of the lung. 3. Lymph node metastasis: If lymph node metastasis occurs, lymph nodes may be enlarged in the affected area. For example, supraclavicular lymph node metastasis, neck lymph node metastasis. 4. Brain metastasis: if brain metastasis occurs, patients will have headache, vomiting, dizziness and other nervous system symptoms. If lung adenocarcinoma patients have the above symptoms after surgery, they should actively consult the doctor to clarify their condition and follow standardized treatment, and they should not use medicine by themselves.