CNS tumor is not the most serious, the disease belongs to low-grade malignant tumors, and the prognosis of patients after active treatment is usually better. CNS tumors are tumors of neuronal and mixed neuronal glial origin, and the WHO classification is grade II, which means that the disease is a low-grade malignant tumor, causing less damage to patients, and the prognosis of most patients is relatively good after active treatment. Symptoms of CNS tumors are usually not obvious at the early stage of the disease, and with the development of the disease, patients may have symptoms of increased intracranial pressure such as headache, cerebral edema, vomiting, and other symptoms, as well as motor dysfunction such as limb paralysis, muscle atrophy, and sensory disorders such as numbness of limbs and ant-walking sensation of limbs. After the occurrence of the above symptoms, patients can seek medical treatment through brain CT, MRI and other examinations for diagnosis, and after confirmation of diagnosis, treatment can be carried out through tumor resection surgery as soon as possible, and if the resection surgery fails to completely remove the tumor, radiotherapy should be adopted under the guidance of doctors according to the actual situation of the patients for adjuvant treatment. To sum up, CNS tumor is not the most serious one, and the main principle of treatment is early detection and early treatment. It is recommended that patients should consult doctors as soon as possible when they have symptoms such as unexplained vomiting and headache, so as to avoid delaying the condition.