- Bleeding from 1 or both nostrils
- Not caused by an injury
Causes of Nosebleeds
Nosebleeds are common because of the rich blood supply of the nose. Common causes include:
- Spontaneous Nosebleed. Most nosebleeds start up without a known cause.
- Rubbing or picking the nose is the most common known cause. It's hard to not touch or rub the nose.
- Blowing the nose too hard can cause a nosebleed.
- Suctioning the nose can sometimes cause bleeding. This can happen if the suction tip is put in too far.
- Sinus Infections. The main symptoms are lots of dry snot and a blocked nose. This leads to extra nose blowing and picking. The sinus infection is more often viral than bacterial.
- Nose Allergies. The main symptom is a very itchy nose. This leads to extra rubbing and blowing.
- Dry Air. Dryness of the nasal lining makes it more likely to bleed. In the winter, forced air heating often can dry out the nose.
- Allergy Medicines. These help the nasal symptoms, but also dry out the nose.
- Ibuprofen and Aspirin. These medicines increase the bleeding tendency. Aspirin is not used in children.
- Bleeding Disorder (Serious). This means the blood platelets or clotting factors are missing or not working right. A bleeding disorder should be suspected if the nosebleed can't be stopped. Excessive bleeding from the gums or with minor cuts is also a clue. Bleeding disorders are a rare cause of frequent nosebleeds.