Glioma is a general term for a large group of primary intracranial tumors that occur from glial cells derived from neural ectoderm, and is the most common type of intracranial tumor. The World Health Organization classifies them into grade I-IV, with grade I and II being low-grade gliomas and grade III and IV being high-grade gliomas. The symptoms of glioma are mainly increased intracranial pressure and focal localization symptoms. 1. Vomiting: It can be the first symptom and one of the main symptoms. It is often accompanied by severe headache and is also common in the early morning, usually not related to diet. In children, the headache is not significant due to the separation of the cranial suture, and vomiting is more prominent because of the tumor in the posterior cranial fossa. 2.Headache: Most of them are caused by the increase of intracranial pressure, mostly occurring in the early morning, which is throbbing pain, distending pain, paroxysmal or continuous, sometimes light and sometimes heavy, and the headache will gradually increase with the development of tumor. 3.Epilepsy: Some patients have epilepsy symptoms, and they can be early symptoms. The seizures are mostly caused by the direct stimulation or pressure of tumor. The type of seizure is often partial, but can also be generalized. The seizures are related to the location and nature of the tumor, with a high incidence of epilepsy in and around the motor area and a high incidence of astrocytoma and oligodendroglioma. 4. Focal symptoms. The tumor is located in the area where the tumor is located and produces the corresponding symptoms. Tumors in important functional areas such as brainstem will show focal symptoms in early stage. For example, psychiatric symptoms, such as personality change and memory loss, and cone bundle injury, such as weakened or absent ventral reflexes on one side at the beginning of the disease. The course of glioma is mostly slow, but it can also develop acutely with acute intracranial pressure increase or stroke.