Brain tumors, also known as intracranial tumors, are divided into two types: primary and secondary, and secondary are generally caused by metastasis of malignant tumors. Malignant brain tumor accounts for 2% of the whole body malignant tumor; the incidence rate of children is slightly higher, accounting for 7% of the whole body malignant tumor, second only to the incidence rate of leukemia. 85% are adults, the peak age is 20-50 years old, male to female sex ratio is 1.5:1, more men than women. Early detection of brain tumor is crucial for treatment and recovery. The following symptoms should be highly noted: 1. Morning headache: Headache occurs at 4-5 o’clock in the morning and often wakes up in the middle of sleep. 2.Increased cranial pressure headache: Due to the occupying tumor compressing the veins and cerebrospinal circulation, as well as the involvement into the brain tissue edema, the intracranial pressure gradually increases, and the headache is mainly progressive swelling pain, which lasts for a long time. 3. Jet vomiting: No digestive system symptoms, not accompanied by gastric distension, nausea, abdominal pain and diarrhea, and not related to eating. Instead, there is a sudden “jet vomiting” after a headache, and the vomit can often be ejected from 0.5-1.0 meters away. 4.Visual impairment: After brain tumor causes brain pressure to increase, the blood flow in eye vein will be poor, resulting in bruising and edema, which will damage the visual cells on retina in the fundus of the eye and cause distortion of visual objects and vision loss. 5. Monocular protrusion: That is, one eye protrudes forward, leading to incomplete eyelid closure in severe cases. 6.Phantom smell: If the temporal lobe in the lower part of the brain is stimulated by the tumor, the patient can often smell odors that do not exist, such as the smell of burning rubber, burnt rice and foreign smell. 7. Transient loss of recognition: People with temporal lobe brain tumor may have a sense of unfamiliarity with people. Transient lapses in recognition of people may occur for a few seconds or minutes, or in severe cases, mania and confusion. 8. Hyperalgesia: Tumors in the frontoparietal lobe located in the middle of the cerebral hemisphere may cause hyperalgesia of various senses such as pain, heat, cold, touch, vibration, and shape discrimination on the contralateral half of the body. 9.Unilateral deafness: If there is no trauma or otitis media, hearing loss is progressive in one ear, which is probably caused by intracranial tumor compressing the auditory nerve. 10. Late-onset epilepsy: Epilepsy begins to occur after adulthood. If there is no history of trauma or other triggers, brain tumor should be considered first.