What I got from a website:
Nosebleed Causes
* Trauma to the nose (nose picking, foreign bodies, forceful nose blowing).
* The most common cause of a nose bleed is drying of the nasal membranes.
* Tumors, particularly malignant tumor of the nose or sinuses.
* The incidence of nosebleeds is higher during the colder winter months when upper respiratory infections are more frequent, and the temperature and humidity fluctuate more dramatically.
* Use of "blood thinning medications" called anti coagulants.
* Recurrent nosebleeds may be a symptom of an underlying disorder such as high blood pressure.
* Inflammation of the nose or sinuses and cold may cause a nose bleed.
* Deviated septum (when the partition between your nose is crooked), foreign objects in the nose, or other nasal obstruction may also cause nosebleeds.
Symptoms
* Bleeding from one or both nostrils.
* Frequent swallowing.
* Sensation of fluid flow in the back of the nose and throat.
http://health.hpathy.com/nosebleed-sympt...t-cure.asp
Does your nose feel dry?