Right nosebleed is often associated with atrophic rhinitis, maxillary sinus hemorrhage necrotizing nasal polyps, nasal septum deviation and other causes, such as the discovery of such symptoms need to be vigilant about related diseases. 1. Atrophic rhinitis: the mucosa is only chronic inflammatory changes in the early stage, and then develops into progressive atrophy. Nasal mucous membrane atrophy and thinning, dry or digging and blowing the nose to cause capillary rupture can lead to rhinorrhea. 2. Maxillary sinus hemorrhagic necrotizing nasal polyps: in the process of growth and progression of the swelling, unilateral nasal intermittent rhinorrhea phenomenon can occur, and more dark red necrotic tissues can be seen in the nasal cavity (mostly on one side), which are easy to bleed when touched. 3. Deviated septum: If the deviated septum is more serious, it may lead to erosion of the mucous membrane on the thinner side, causing repeated bleeding. The right nosebleed should also be alert to the possibility of other diseases, such as blood system diseases, if repeated bleeding must be timely to the hospital, with the doctor active examination, a clear diagnosis.