Nosebleeds every now and then may be caused by dry rhinitis, but do not rule out nasopharyngeal cancer, leukemia and other pathological factors. It is recommended to consult the ear, nose and throat department in a timely manner, under the guidance of the doctor to clarify the cause of the disease and then carry out treatment. 1. Dry rhinitis: if patients with dry rhinitis are located in places with high ambient temperature and low humidity in the air, they may be more prone to nasal mucous membrane dryness and congestion than normal people, which makes the fragility of mucous membrane and capillaries increase, and thus nosebleeds occur every now and then. 2. Nasopharyngeal cancer: mainly due to EBV infection, environmental factors, genetic factors and other factors, resulting in malignant tumors occurring in the mucosal epithelium of nasopharynx. It may cause frequent nosebleed, tinnitus, hearing loss and other uncomfortable symptoms. 3. Leukemia: It is usually a malignant clonal disease of hematopoietic stem progenitor cells caused by uncontrolled cell proliferation and differentiation disorders, thus stopping at different stages of development. Clinically, there will be abnormal bleeding from the nose, anemia, weakness and other uncomfortable symptoms. There are more diseases that cause this symptom, so it is necessary to actively seek medical treatment and improve the examination to clarify the diagnosis.