What cause nosebleeds?

What cause nosebleeds?
Following is a list of cause or underlying conditions (see also Misdiagnosis of underlying causes of Nosebleeds) that could possibly inflict Nosebleeds includes:
* Nose conditions
o Nose injury
o Broken nose
o Nose picking
o Nasal congestion
o Common cold
o Allergies
o Nasal polyp
o Nasal infection
o Nasal tumors
o Sinus tumors
* Dry nasal passage
o Cold dry air
o Cocaine
o Aging
o Menopause
* Bleeding disorders
* Leukemia
* Hypertension
* Rapid mass loss
* Excessive dieting
* Head injury
* Certain medications
Most nosebleeds come to pass because of a minor irritation or cold. Other common cause include injury, blowing the nose massively hard, remarkably cold or very dry nouns, allergic rhinitis, upper respiratory infection, blood thinners, nasal spray, chemical irritants, and repeated sneezing. Repeated nosebleeds can be a symptom of another disease such as allergies, a bleeding disorder, or a tumor in the antenna or sinuses. Occasionally a blood vessel in the trunk needs to be cauterized. If you hold repeated nosebleeds, you need to see a doctor.
Very giant blood pressure can also cause nosebleeds.
Nose bleeds hold a huge list of potential cause. If you are getting recurrent trunk bleeds and cannot provide yourself with an explanation, please call round your doctor so he may take a look.