Bleeding from nose blowing is usually caused by dry rhinitis, sinusitis and ruptured nasal capillaries. 1. Dry Rhinitis: Due to blowing the nose too hard, the mucous membrane or capillaries which are brittle and easy to break in dry rhinitis are damaged, and usually there is a small amount of blood seepage. 2. Sinusitis: Inflammation will cause erosion of the nasal mucosa, when the capillaries in the nose are very fragile, causing bleeding when blowing the nose. 3. Nasal capillary hemangioma: when blowing the nose, the patient with this disease, the hand pressure on the nasal cavity caused the rupture of the nasal hemangioma, may cause bleeding phenomenon. When there is too much blood or abnormal situation when blowing the nose, you need to go to the regular hospital to improve the nasal endoscopy examination, clear diagnosis.