Tumors in the brain can increase intracranial pressure, seizures, hemiparesis and blindness as the size of the tumor increases. Generally, these symptoms need to be treated by surgery, and some brain tumors also need to be treated with radiotherapy. After the appearance of intracranial tumor, with the increase of tumor volume, the situation of increased intracranial pressure will occur, which will be manifested as projectile vomiting, dizziness, headache and so on. After the brain tissue and brain nerves are compressed, their normal function is affected, which may cause abnormal discharge of brain nerves leading to epilepsy or hemiplegia and other symptoms. If the optic nerve is compressed, it may also cause blurred vision and blindness. Surgery should be performed to remove the brain tumor to remove the pressure of the tumor on the brain tissue and restore the normal function of the brain to the maximum extent. If the tumor is malignant, which may be accompanied by local tissue infiltration or metastasis, it should also be treated with postoperative radiotherapy, such as stereotactic radiotherapy, in order to maximize the killing of tumor cells or reduce recurrence. Once a brain tumor is diagnosed, it should be treated immediately without delay.