Why does nosebleed occur
Aug 19, 2025
Source: Cainiu Health
Dr. Yang Ziqi
Introduction
Nosebleeds may be caused by dry air, habitual nose picking, rhinitis, sinusitis, hypertension, etc. Inflammation from the sinuses can spread to the nasal cavity, leading to congestion and swelling of the nasal mucosa, increased vascular fragility, and subsequent bleeding. This is often accompanied by symptoms such as purulent nasal discharge, headache, and reduced sense of smell. Doctors may prescribe mometasone furoate nasal spray, amoxicillin-potassium clavulanate dry suspension, and Rhinosinusitis Relief Granules (Nasal Sinus通畅 Granules).
Nosebleeds may be caused by dry air, habitual nose picking, rhinitis, sinusitis, hypertension, and other factors. If abnormalities occur, timely medical attention is recommended. Detailed explanations are as follows:
1. Dry air: A dry environment causes the nasal mucosa to lose moisture, making the mucosa fragile and prone to rupture, which can lead to nosebleeds. Using a humidifier to increase indoor humidity and drinking more water to replenish body fluids can help alleviate dryness of the nasal mucosa.
2. Nose picking: Frequently picking the nose with fingers can damage the nasal mucosa and capillaries, causing blood vessels to rupture and bleed. The habit of picking the nose should be corrected, nasal hygiene maintained, and mechanical injury to the nasal mucosa avoided.
3. Rhinitis: Inflammation irritates the nasal mucosa, causing congestion and swelling. The blood vessels beneath the mucosa are prone to rupture and bleeding. Symptoms often include nasal congestion, runny nose, nasal itching, and sneezing. Doctors may prescribe medications such as budesonide nasal spray, loratadine tablets, and montelukast sodium chewable tablets for treatment.
4. Sinusitis: Inflammation from the sinuses spreads to the nasal cavity, causing nasal mucosal congestion and edema, and increased vascular fragility leading to bleeding. Symptoms often include thick nasal discharge, headache, and reduced sense of smell. Doctors may prescribe mometasone furoate nasal spray, amoxicillin and clavulanate potassium dry suspension, and "BiYuan TongQiao" granules.
5. Hypertension: Prolonged high blood pressure increases pressure in the small blood vessels of the nasal cavity, making them prone to rupture and bleed. Nosebleeds often occur when blood pressure is elevated, accompanied by symptoms such as dizziness and headache. Active blood pressure control is necessary. Patients can take medications such as nifedipine sustained-release tablets, irbesartan tablets, and hydrochlorothiazide tablets under a doctor's guidance, along with local hemostatic measures.
In daily life, maintaining appropriate indoor humidity to avoid nasal dryness and developing good hygiene habits to prevent nose picking are recommended.
