The five senses are very important to a person, we can hear beautiful music, taste delicious food, see the colorful world, smell the birds and flowers …… All of this is thanks to the role of our five senses, however, if the five senses once a lesion occurs then it is also a sign that our brain has a lesion. The eyes are the window to our soul. When we feel blurred vision or loss of vision, we should not arbitrarily think that it is due to overuse of eyes or old eyes, because it may be the precursor of brain tumor. As we know, the typical manifestation of brain tumor is the increase of intracranial pressure, which includes optic papilledema. When brain tumor causes increased pressure in the brain, the blood flow in the eye veins will be poor, resulting in stasis and edema, which will damage the visual cells in the retina of the eye, resulting in distortion of visual objects, thus causing vision loss. Ear Progressive hearing loss If there is no history of otitis media or trauma, progressive hearing loss in only one ear, accompanied by ipsilateral tinnitus, is most likely due to intracranial tumors compressing the auditory nerve. However, since people use both ears to hear sound, it is difficult to detect hearing loss in one ear, unless they often use one ear to listen to phone calls and suddenly find that they cannot hear. Oral cavity Intracranial tumors do not directly cause oral cavity problems, but often cause vomiting. Take vomiting in children as an example, 80% of the early symptoms of brain tumors in children can be vomiting. In addition, vomiting in children with brain tumors mostly occurs in the early morning, with intermittent episodes as the disease progresses. Most of the vomiting is jet vomiting, and most of the children also have headache or dizziness. Therefore, parents should be highly alert when their children have unexplained vomiting, and should not blindly interpret it as a gastrointestinal problem. Nose The nose is the bridge between us and various smells from the outside world. But if our nose suddenly “strike”, often smell something such as “burning rubber”, “burning chicken feathers”, “rotten eggs But if our nose suddenly goes on “strike” and we often smell something like “burning rubber”, “burning chicken feathers”, “rotten eggs”, and no one else smells it at the same moment, we should be alert. This phenomenon is likely that when the brain tumor grows, the olfactory center located in hippocampal hook gyrus will be affected and disturbed, which in turn leads to the phenomenon of phantom smell. In fact, there are various symptoms caused by intracranial tumors, and the above mentioned are only the ones that can be easily ignored and delayed. Therefore, the director of neurosurgery department of Tangdu Hospital of the Fourth Military Medical University, Qu Yan, warmly suggests that we should be a mindful person in our life and seek medical attention when abnormalities are detected.