Head swelling in lung cancer should be perfected and examined to clarify the cause of head swelling, and treated symptomatically. Intracranial metastases and paraneoplastic syndrome are generally considered. Lung cancer is the most common primary malignant tumor of lung originating from bronchial mucosa or glands. Clinical symptoms are mostly insidious, mainly manifested as cough, sputum, hemoptysis, chest pain and emaciation. If the symptoms of head swelling occur, it is necessary to consult a doctor in time, complete auxiliary examination, such as cranial CT or MRI, tumor markers, blood routine, etc., to clarify the cause of the disease, generally intracranial metastatic tumor, paraneoplastic syndrome is easy to cause head swelling. Generally, intracranial metastases and paraneoplastic syndromes are easy to cause head distension. If intracranial metastases cause head distension, it is generally necessary to lower the cranial pressure, such as infusion of mannitol, etc., and cranial radiation therapy can also be carried out, all of which should be carried out under the guidance of doctors. When lung cancer manifests as paraneoplastic syndrome, blood pressure may be elevated, and dizziness and head swelling may easily occur, at this time, it is necessary to actively treat the primary disease and standardize the use of antihypertensive drugs, such as valsartan, etc., under the guidance of doctors.