Nosebleed rhinitis may be caused by chronic dry rhinitis, acute rhinitis and allergic rhinitis, which cause bleeding due to mucous membrane damage or capillary rupture. 1. Chronic dry rhinitis: due to less secretion of nasal glands, the mucous membrane gradually dries up, and the mucous membrane cracks and crusts, resulting in a small amount of nosebleed. 2. Acute rhinitis: viral and bacterial infections can lead to acute inflammation of the nasal mucosa, and the blood vessels are invaded by the inflammation, causing vasodilatation and rupture of the blood vessels, thus leading to nosebleeds. 3. Allergic rhinitis: allergic reaction occurs after atopic body is exposed to allergens, causing congestion and edema of nasal mucosa, and when blowing the nose frequently, the airflow strongly impacts the fragile mucosa to rupture and cause nosebleed. After the occurrence of rhinitis, if there are symptoms of nosebleed, you should actively seek medical treatment, systematic examination to clarify the diagnosis, and follow the doctor’s instructions to standardize the treatment.