Nosebleed is a relatively common clinical symptoms, for 40-year-old woman often nosebleed cause, the main consideration for nasal capillary hemangioma, atrophic rhinitis, nasal lymphoma and other diseases and cause. 1. Nasal capillary hemangioma: it is a common benign vascular tumor of the nasal cavity, mainly composed of proliferating vascular endothelial cells and expanding capillaries, when subjected to trauma, friction or pressure, it can lead to rupture and bleeding of nasal capillary hemangiomas, which causes 40-year-old women to often have nosebleeds. 2. Atrophic rhinitis: a chronic occurrence of diffuse, progressive nasal atrophic lesions, mainly for endocrine disorders or vitamin deficiencies, long-term inhalation of harmful chemical gases and cause nasal dryness, bleeding and other phenomena. So atrophic rhinitis can also lead to 40-year-old woman often nosebleed. 3. Nasal lymphoma: it is a special type of extranodal lymphoma occurring in the nose, which can be divided into T-cell, B-cell and NK-cell lymphoma, and the lesions mostly start from the nose, mainly located in the midline of the face and upper respiratory tract, and the initial intermittent nasal congestion, accompanied by watery or bloody secretion, or can be ruptured by the tumor body and bleeding. Therefore, nasal lymphoma can also cause 40-year-old woman to have nosebleeds frequently. As the causes of 40-year-old woman often nosebleed are more reasons, it is best to go to the hospital in time to improve the examination and diagnosis.