Common symptoms of brain tumor include headache, vomiting, vision loss, tinnitus and deafness, numbness of limbs and so on. 1. Headache: it is the most common symptom of brain tumor. Headache will occur repeatedly and frequently at night, which is mainly caused by increased intracranial pressure. 2. Vomiting: it will present jet-like vomiting, which often occurs suddenly after a headache, and is not accompanied by abdominal distension, nausea, abdominal pain and diarrhea. 3. Loss of vision: if the tumor compresses the optic nerve, causing papillary edema of the optic nerve, the vision will be reduced, and in severe cases, blindness will occur. 4. Tinnitus and deafness: it is often unilateral intermittent attack, which may be aggravated with the progress of tumor, and persistent tinnitus and deafness. 5. Limb dysfunction: the tumor affects the sensory area or motor area, there may be numbness, abnormal sensation of limbs, weakening of limb strength, paralysis and other symptoms. Brain tumor patients must seek medical treatment in time, so as to avoid delaying the condition and even endangering the life.