How long the back pain after lung cancer will last is generally due to the degree of disease or recovery, and it is not certain how long the back pain will last due to the big difference between individual patients, and the specific situation needs to be different from person to person. If the lung cancer is under effective control and the patient actively cooperates with the doctor for follow-up treatment, the pain will gradually disappear or reduce with time, and can be gradually relieved in 1~2 weeks. However, if the patient does not cooperate with the doctor for follow-up treatment and the tumor is not under control, the pain may persist. If the pain is severe, patients should go to the hospital for appropriate examination to determine whether bone metastasis has occurred. It is suggested that patients should pay attention to a light diet during the recovery process, and can do some moderate exercise, which can help to relieve the back pain.