The lining of your nose contains many tiny blood vessels that lie close to the surface and are easily damaged.
The two most common causes of nosebleeds are: Dry air — when your nasal membranes dry out, they're more susceptible to bleeding and infections Nose picking
Other causes of nosebleeds include: Acute sinusitis Allergies Aspirin use Blood thinners (anticoagulants), such as warfarin and heparin Chemical irritants, such as ammonia Chronic sinusitis Cocaine use Common cold Deviated septum Foreign body in the nose Nasal sprays, such as those used to treat allergies, if used frequently Nonallergic rhinitis Trauma to the nose
Infection Trauma, including self-induced by nose picking, especially in children Allergic and non-allergic rhinitis Hypertension (high blood pressure) Use of blood thinning medications Alcohol abuse Less common causes include tumors and inherited bleeding problems Hormonal changes during pregnancy may increase the risk of nosebleeds.
Less common causes of nosebleeds include: Alcohol use Hemophilia Hereditary hemorrhagic telangiectasia Idiopathic thrombocytopenic purpura (ITP) Leukemia Nasal polyps Nasal surgery Nasal tumor Sarcoidosis Poisoning
Blood running out of noe could also mean chemical poisoning.