The common clinical reasons for frequent bleeding from the nose include environmental factors, nasal diseases, blood diseases, etc. 1. Environmental factors: there are abundant capillaries in the front part of the nose, when the environmental temperature rises and the air humidity drops, it may cause the capillaries to expand and the nasal mucosa to dry up, etc. The capillaries in the nose are relatively fragile, and frequent nosebleeds are easy to occur in this case. 2. Nasal diseases: clinically, the common diseases include deviated nasal septum, nasal hemangioma, etc. The above mentioned diseases may cause damage to the mucous membrane of the nasal cavity and the capillaries in the mucous membrane, which may result in symptoms such as nosebleed and pain in the nose. 3. Blood diseases: clinically common such diseases are primary thrombocytopenia, certain leukemia, etc. The above diseases will cause the body to fall in platelets, reduced coagulation function, etc., and the capillaries of the mucous membrane in the nasal cavity are rich and fragile, which will easily lead to nosebleed phenomenon. If the symptoms persist, it is recommended to go to the hospital as soon as possible for a clear diagnosis and targeted treatment.