The common causes of back pain two months after lung nodule surgery are incision not healed, intercostal nerve damaged, pleural effusion and so on. 1. The incision has not healed: generally two months after the lung nodule surgery, the incision has reached healing, if the incision swelling, redness, pain, indicating that the incision has not healed, radioactively cause back pain. 2. Damage to intercostal nerves: whether it is lumbo-scopic or traditional surgery, it will lead to damage to local nerves and muscle tissues, and when it damages the intercostal nerves in the back, it will cause back pain. 3. Pleural effusion: improper postoperative care and complications such as lung infection cause pleural effusion, which, together with inflammatory stimulation, leads to back pain. Lung nodule surgery two months back pain may also have other reasons, such as lung tumors, etc., it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment.