Nasal mucus with blood, belongs to snot blood, mostly seen in rhinitis, deviated nasal septum, sinusitis, nasal cavity or sinus tumor and other reasons. 1. Rhinitis: Rhinitis is a disease caused by inflammation of the nasal mucosa, mainly manifested as nasal congestion, runny nose, sneezing and other symptoms, which can lead to mucous membrane damage caused by bleeding, manifested as snot with blood and other symptoms. Antibiotic ointment can be used to repair the mucous membrane damaged by inflammation. 2. Deviated nasal septum: The mucous membrane in the deviated area is thin and easy to bleed, accompanied by nasal congestion, headache and other symptoms. Surgery is needed to correct the deviated septum. 3. Sinusitis: Sinusitis is caused by the infection of the mucous membrane in the sinus cavity, mainly manifested as nasal congestion, pus flow, headache and other symptoms, and some of the mucous membrane in the sinus cavity will produce blood in the snot when the blood vessels are broken. It can be treated with antibiotics for anti-inflammatory treatment and surgery if necessary. 4. Nasal cavity or sinus tumor: mainly manifested as nasal congestion, blood in nasal mucus, headache and other symptoms, through the nasal endoscopy, nasal CT scanning examination to clarify the condition, and if necessary, through the pathology and histology examination to clarify the diagnosis. It needs to be treated by radiotherapy or surgery. In the above case, consult a doctor as soon as possible to clarify the cause of the disease and follow the doctor’s instructions.