Glioma is a kind of tumor with very inconspicuous early symptoms, and it is very easy to be confused with other diseases when some abnormal symptoms appear in the brain, thus bringing inconvenience to the diagnosis and treatment of the disease. So, what are the early symptoms of glioma? 1.Headache: It is more intense in nature, often comes on in the early morning, sometimes waking up with pain during sleep, but the headache will gradually relieve or disappear after getting up with light activities. 2.Vomiting: Due to the increase of intracranial pressure, the medulla oblongata respiratory center is stimulated and vomiting occurs. 3.Visual impairment: The increased intracranial pressure will cause poor venous blood flow back to the eye, leading to bruising and edema, which will damage the visual cells on the retina in the fundus of the eye, resulting in vision loss. 4. Mental abnormalities: Brain tumors located in the frontal lobe of the brain can disrupt the mental activities of the frontal lobe, causing mental abnormalities such as excitement, agitation, depression, repression, forgetfulness and fiction. 5.Unilateral limb sensory abnormalities: The parietal lobe located in the middle of the cerebral hemisphere is specialized in sensory management. Tumors in this part often cause unilateral limb pain, temperature, vibration and shape discrimination sensation to be reduced or disappeared. 6.Phantom smell: tumor in temporal lobe can cause phantom smell under its stimulation, i.e. smell an odor that does not exist, such as burnt rice or burnt rubber. 7. Hemiplegia or staggering gait: Cerebellar lesions are more specific, i.e. patients often develop hemiplegia or staggering drunken gait after headache, vomiting and visual impairment. 8. Tinnitus and deafness: These are most often found when talking on the phone, i.e., one ear can hear and the other cannot. The performance is mostly a precursor of auditory neuroma. 9.Gigantism: Mostly seen in pituitary tumors. The patient grows rapidly and develops acromegaly (large chin, large nose, enlarged lips and tongue, and abnormally large hands and feet). 10. Growth arrest in young children: common in craniopharyngioma. The clinical manifestation is that the body is only five or six years old at the age of fifteen or sixteen, and the sexual characteristics are not developed, and the belly is full of fat, which looks like “teenage fat”.