How long can you have sex after lung cancer surgery is mainly based on the patient’s recovery from surgery. In early stage, after surgery, you can’t have sex for two weeks, at least 1-2 months. In the middle stage, sex is not suitable during radiotherapy. For early stage lung cancer patients, the wound recovery after surgery is better, and they can live and work normally after about two weeks, or they can start to resume sexual life gradually in 1-2 months after surgery. For middle stage lung cancer patients (clinical stage II-III patients), they need to cooperate with radiotherapy, chemotherapy and other auxiliary treatments after operation, and most of them are physically weak, so it is not suitable for them to have sexual life too early. The interval after surgery is about one month or even longer. For patients with advanced lung cancer, most of them cannot undergo surgery because the lesions involve more organs and surgical treatment is more difficult. And advanced lung cancer patients are in poor physical condition, so they should not have sexual life. When lung cancer patients are done with surgery, they need to strengthen diet and nutrition, and it is recommended to ensure enough sleep and go to the hospital for rechecking regularly. Don’t overwork, so as to avoid the complications caused by exertion.