Nose with yellow nasal mucus with blood, may be nasal foreign body with infection, sinusitis, acute rhinitis and so on. 1. Nasal foreign body with infection: the presence of a foreign body in the nasal cavity can easily induce infection, so there will be yellow nasal discharge, and the foreign body will press and stimulate the mucous membrane of the nasal cavity, which will result in the phenomenon of yellow nasal discharge with blood in the nose. 2. Sinusitis: sinusitis is a typical symptom of nasal congestion, yellow pus flow, some patients will also be accompanied by a decreased sense of smell, but also cause nasal mucosal congestion, due to inflammatory factors stimulate mucosal vascular fragility caused by bleeding phenomenon, which will result in the phenomenon of yellow snot with blood in the nose. 3. Acute rhinitis: due to viral infection secondary to bacterial infection will secrete yellow nasal discharge, inflammatory secretions stimulate mucous membrane will destroy the mucous membrane and submucosal capillaries, if this time to blow the nose will cause yellow nasal discharge with blood. There are many reasons for yellow snot with blood in the nose, we suggest that patients go to the hospital in time to improve the examination, a clear diagnosis, do not ignore the symptoms and take it lightly!