The following headache characteristics may indicate the occurrence of brain tumor: 1. Acute or recent headache that lasts for a whole day or a whole month; 2. Chronic headache that tends to worsen; 3. Headache that interferes with sleep; 4. Unilateral headache; 5. Headache with nausea and vomiting; 6. Headache with cognitive and behavioral symptoms; 7. Headache with weakness or numbness of limbs; 8. Headache with loss of vision or blurred vision. In the above cases, it is recommended to consult a neurosurgeon at the hospital as soon as possible and to conduct relevant examinations.