Brain tumors usually recover in 1 to 3 months after radiation therapy. Brain tumor is the common name of intracranial tumor, which refers to the nervous system tumors occurring in the cranial cavity, including primary tumors originating from neuroepithelial tissue, germ cells and secondary tumors metastasized from other system tumors. Radiotherapy is a common anti-tumor treatment, which belongs to local treatment. Radiotherapy for intracranial tumors may cause increased intracranial pressure, radiation encephalitis and other conditions, manifesting dizziness, headache and vision loss. During the treatment period, regular review should be conducted in strict compliance with the doctor’s instructions in order to monitor the adverse reactions and the progress of the disease. If uncomfortable symptoms persist, it is necessary to go to the hospital in time for consultation and active treatment to avoid delaying the condition.