When patients with brain metastasis of lung cancer have confusion and unsteady walking, they can undergo surgery to remove the primary cause of lung cancer, and cooperate with radiotherapy to control the cancer cells. Since brain metastasis is in advanced stage, timely nutritional support is also important. 1. Surgical resection: For malignant tumors with brain metastasis or other metastases, early surgical resection of the primary lesion is recommended. By removing the primary lesion, the chance of subsequent metastasis or recurrence can be effectively reduced, so as to achieve the cause-specific treatment. 2. Radiotherapy: For cancer patients with distant metastasis, radiotherapy can effectively control the spread and proliferation of metastatic cancer cells, so as to inhibit the growth of cancer cells and avoid metastasis. At the same time, radiotherapy can be applied to the whole body or local area, so as to have better therapeutic effect on the metastatic foci. 3. Nutritional support: brain metastasis belongs to the late stage of malignant tumor development, at this time, the chances of radical treatment are small. Since the immune system and body function of patients have been seriously damaged, timely nutritional support treatment can effectively prolong their life by maintaining basic metabolism through intravenous infusion of nutrient solution. After brain metastasis of lung cancer, the chance of radical treatment is not high, and the treatment is generally aimed at maintaining life, so it is recommended to treat the disease as early as possible, follow the doctor’s instructions and choose the appropriate program.