There are various reasons why early stage lung cancer still hurts one year after surgery, including pleural adhesion or cancer recurrence and metastasis. 1. Pleural adhesion: cancer patients may have protein leakage, and if protein is not absorbed in time, pleura will have adhesion, resulting in long-term chest pain. Antibiotics such as penicillin and ceftriaxone can be used for treatment under the guidance of doctors. 2. Cancer recurrence and metastasis: when the cancer recurs or has pleural metastasis, the symptom of chest pain may also appear. The next examination such as lung CT, MRI or pathological biopsy should be carried out to determine whether there is metastasis or not, and discuss the treatment plan with doctors to carry out surgical resection or radiotherapy and other treatment measures. Therefore, when patients still have pain one year after lung cancer surgery, they should go to hospital to find out the cause of the disease and get timely treatment.