The cause of brain tumor is not clear, it may be related to genetic factors, environmental factors, or caused by tumor metastasis from other parts of the body. Genetic factors: Parents who are tumor patients may cause their children to carry cancer-causing genes, leading to hereditary neurological tumors. Environmental factors: Due to long-term exposure to physical factors such as radiation and ionizing radiation, researchers or hospital radiology staff and factory production staff with long-term exposure to chemical substances such as methylnitrosamine and ethylnitrosamine may increase the chances of developing brain tumors. 3. Metastasis of cancer cells from other parts: Cancer cells from malignant tumors in other parts of the body, such as lung cancer, breast cancer, liver cancer, etc., are easily transferred to the brain, thus leading to the occurrence of brain tumors. Keeping away from disease-causing factors in daily life can reduce the risk of brain tumor.