Bleeding from dry nose is firstly considered to be caused by physiological factors such as dry environment and frequent nose picking. If accompanied by other uncomfortable symptoms, need to be alert to dry rhinitis, nasal septum deviation and other diseases. 1. Physiological factors: If the environment is dry, it will lead to dry nasal mucosa and dry nose bleeding. Or it may be triggered by factors such as picking the nose and blowing the nose. 2. Dry rhinitis: the cause of dry rhinitis is related to dry climate, long time exposure to dust, anemia, indigestion, dry rhinitis and other factors. Patients often have symptoms such as nosebleed, nasal congestion, dryness inside the nose and reduced nasal secretion. 3. Deviated septum: Deviated septum is caused by uneven growth of bone and cartilage during development, trauma, or occupational lesions such as sinus tumor or huge nasal polyps. It manifests as nasal congestion, nose bleeding, etc. If the deviated part presses on the inferior turbinate or middle turbinate, it may also be accompanied by headache and dizziness, etc., and the symptom of dry nose bleeding. Patients with dry nose bleeding are advised to go to the hospital, under the guidance of the doctor, to carry out relevant examinations, identify the cause of the disease, and take relevant therapeutic measures.