The early symptoms of glioma mainly include headache, vomiting, epilepsy, local symptoms and so on. Headache and vomiting are symptoms that appear when intracranial pressure is increased due to tumor occupancy and edema. Headache is often intermittent, pulsating dull pain or distension at the beginning. The headache can be limited or full headache, and can be accompanied by nausea and vomiting in severe cases, and the headache can be relieved after vomiting. Any factors that cause the increase of intracranial pressure, such as cough, sneeze, stool, etc., can aggravate the headache. The headache can be aggravated when there is bleeding inside the tumor. When the headache is suddenly aggravated and accompanied by jet vomiting, the patient may gradually become comatose in severe cases. Vomiting caused by glioma may or may not be preceded by nausea and is often accompanied by severe headache and dizziness. Sometimes the vomiting is jet-like and is mostly caused by increased intracranial pressure stimulating the vomiting center. Pediatric posterior cranial fossa tumors show vomiting early and frequently, and it is often the only early symptom. In some slow developing gliomas, the symptoms of increased intracranial pressure appear only when the tumor length is large due to compensatory effects. Epilepsy in glioma patients can be an early symptom. The majority of patients whose epilepsy begins in adulthood are due to brain tumors. The presence of a brain tumor should be considered in patients whose seizures are not easily controlled by medication or have a change in nature. Those with tumors adjacent to the cerebral cortex are prone to epilepsy. Depending on the location of the tumor, the corresponding symptoms caused by tumor compression may vary. Depending on the location of the glioma, the corresponding local symptoms may arise and worsen progressively. For example, tumors in the speech area may cause speech disorders in early stages, tumors in the motor area may cause motor disorders in one limb, and tumors in the visual conduction pathway may cause visual acuity and visual field disorders.