Severe insomnia of lung cancer patients after surgery may be related to psychological factors or uncomfortable symptoms caused by surgery. Long-term severe insomnia will affect patients’ physical health and disease recovery, so it is recommended that patients go to the hospital in time to seek help. 1. Psychological factors: most patients suffer from the pain of the disease, leading to fall into a bad mood. Psychological depression, anxiety and other conditions, it will lead to patients with severe insomnia. Patients should adjust their emotions and face the disease with a positive mindset. Family members should give the patient as much care and understanding as possible during the treatment period to help channel the bad mood, and may also seek help from psychologists. 2. Discomfort caused by the postoperative period: such as postoperative fever, wound pain, respiratory problems and other uncomfortable symptoms, resulting in patients not being able to sleep and severe insomnia. If pain symptoms are obvious, drugs such as tramadol and dizocin can be used for pain relief. Patients with high postoperative body temperature, resulting in insomnia, can be treated with the physical method of cold compresses combined with the application of antipyretic drugs. Long-term severe insomnia without treatment will affect the physical and mental health of patients, and may lead to aggravation of the condition. It is recommended that patients seek help from the hospital in time.