The causes of meningiomas are not fully understood, but may be related to genetics, hormones, radiation and certain traumas and diseases. 1. Genetic factors: For meningioma patients, first-degree relatives have a higher risk of developing meningioma than normal people. 2. Hormonal factors: Studies have shown that the development of meningioma may be related to the effect of estrogen, and the use of exogenous hormones (e.g. oral contraceptives, hormone replacement therapy) may increase the risk of meningioma. 3. Radiation factors: Ionizing radiation may increase the risk of meningioma, such as head radiation therapy and radiation examination. 4. Traumatic factors: Especially traumatic brain injury, when the head is traumatized, the cells in the skull may increase the risk of gene mutation in the process of repairing the damage, which may also lead to meningioma. 5. Disease factors: certain diseases will increase the risk of meningioma, such as type 2 neurofibromatosis, breast cancer and so on. In conclusion, the occurrence of meningioma may be related to a variety of factors. Paying attention to the above risk factors of meningioma is helpful to reduce the risk of meningioma.