Nosebleeds can be seen in anemia, leukemia and acute rhinitis, but also in diseases such as intranasal papilloma, nasal capillary hemangioma and nasal lymphoma. Laboratory tests (e.g. routine blood tests), imaging tests (e.g. MRI) and pathological tests can be chosen according to the symptomatic features to make a clear diagnosis. 1. Laboratory tests: Observe whether there is any abnormality of blood composition through routine blood tests; exclude blood diseases through four tests of coagulation; detect infection through secretion culture and drug sensitivity test. 2. Imaging examination: Nasal CT, MRI and other examinations to understand the scope and characteristics of the lesions in the nasal cavity and sinuses, to guide the follow-up examination and treatment. 3. Pathological examination: when suffering from nasal cavity and sinus tumor, there will also be bleeding tendency, and the nature of lesion can be clarified through pathological examination. Nasal bleeding can be timely to the hospital, under the guidance of the physician to carry out systematic examination, a clear diagnosis.