When we eat apples, we often pick good apples, while bad apples usually have worm’s eye scars on the surface, these seemingly small scars are actually reflecting the degree of decay in apples, just like brain tumor. （Headache: Headache is the most common and earliest symptom of intracranial tumor; headache of brain tumor is not serious in the early stage, but it intensifies with time, which often makes patients unbearable and can not be solved by general pain medication. The headache mostly starts in the morning after waking up and can be paroxysmal or persistent, and can be aggravated by coughing or exertion. Generally speaking, supratentorial tumor headache is mostly in the temporal lobe, while inferior cerebellar tumor headache is in the occipital region, posterior neck and orbital region. The cause of fundus edema is due to increased intracranial pressure, which obstructs the lymphatic flow in the lymphatic sheath around the optic nerve, and increased venous filling of the optic nerve. The presence of edema in the fundus will have an effect on vision, and long-term damage to the optic nerve can lead to optic nerve atrophy and cause blindness. Vomiting: caused by direct pressure or stimulation of the medulla oblongata vomiting center or vagus nerve. This symptom is common in subscreen tumors, especially in children, and vomiting is jet-like and frequent when the headache is aggravated. (ii) Neurological dysfunction: The presence of the above symptoms may already indicate the presence of intracranial lesions, but if in combination with the following symptoms, the possibility of having intracranial tumors is high Memory loss, often combined with personality, mental and emotional disorders, is common in prefrontal tumors, which can lead to drowsiness and coma in advanced stages, and can cause epilepsy and limb paralysis if the posterior frontal lobe is involved. Epilepsy, with a complex and varied presentation, and tumors in different lobes of the brain can exhibit different forms of seizures, is one of the most common clinical manifestations of brain tumors. Unilateral tinnitus and hearing loss, commonly associated with tumors near the facial auditory nerve. Endocrine alterations, developmental delay after excessive obesity in children, menstrual disorders, sterility, altered libido and obesity in adults. Limb sensory abnormalities, such as numbness, pain, sensory loss, etc. Ataxia, inflexible limb movement, unstable walking, etc. (iii) Other: vertigo patients feel the rotation of surrounding objects or self-perception of rotation, followed by headache, nausea, vomiting and discomfort; eye abnormalities, such as diplopia, eye movement disorder, eye protrusion, etc.