Nasal blood but not nosebleed indicates that the amount of bleeding is small and the coagulation function is normal. It is considered to be related to physiological factors such as frequent nose picking and dry living environment, and also considered to be related to foreign body in nasal cavity, dry rhinitis, deviated septum, nasopharyngeal carcinoma and so on. 1. Physiological factors: For those who often pick their noses recently and damage the nasal mucosa, live in a dry environment and drink less water, there may be blood in the nasal cavity but no nosebleed. 2. Nasal foreign body: when the nasal cavity into the foreign body, such as buttons, marbles, stones, shells, peanuts, etc., can be due to the foreign body damage to the nasal mucosa and appear nasal blood but not nosebleed phenomenon. 3. Dry rhinitis: the disease is mostly related to climate abnormality, environmental pollution, long-term medication, vitamin deficiency and so on. Typical symptoms of patients are dryness of nasal cavity, filamentous secretion in nasal cavity, and blood in nasal cavity but not nosebleed phenomenon due to local capillary rupture. 4. Deviated nasal septum: developmental abnormalities, trauma, heredity, etc. are the causes of deviated nasal septum, and patients are prone to nasal congestion, headache, nosebleed and other symptoms. Some patients may have blood in the nose but not nosebleed due to small amount of bleeding. 5. Nasopharyngeal cancer: nasopharyngeal cancer is related to EBV infection and genetic factors. Patients may have tinnitus, hearing loss, blood in the nasal discharge, nasal congestion, headache and other uncomfortable symptoms, and may also have blood in the nose but without nosebleed. It is recommended that people with nasal blood but no nosebleed should consult a doctor for examination in order to clarify the cause of the disease and follow the doctor’s instructions for treatment.