Local factors
* Anatomical deformities, such as septal spurs or Osler-Weber-Rendu Syndrome
* Chemical inhalant
* Inflammatory reaction (eg. acute respiratory tract infections, chronic sinusitis, allergic rhinitis and environmental irritants)
* Foreign bodies
* Intranasal tumors (Nasopharyngeal carcinoma in adult, and nasopharyngeal angiofibroma in adolescent males)
* Nasal prong O2 which tends to dry the nasal mucosa
* Nasal sprays, particularly prolonged or improper use of nasal steroids
* Narcotics, particularly insufflated cocaine
* Surgery (such as septoplasty and endoscopic sinus surgery)
* Trauma (usually a sharp blow to the face)
* Nose-picking
* Low relative humidity of air breathed occurring especially during winter seasons.
* Otic barotrauma from descent in aircraft or scuba diving.
[edit] Systemic factors
* Drugs - Aspirin, Fexofenadine/Allegra/Telfast, warfarin, ibuprofen, clopidogrel, isotretinoin, desmopressin and others
* Alcohol (due to vasodilation)
* Allergies
* Anemia
* Connective tissue disease
* Blood dyscrasias
* Envenomation by mambas, taipans, kraits, and death adders
* Heart failure (due to an increase in venous pressure)
* Hematological malignancy
* Hypertension
* Infectious diseases
* Pregnancy
* Vascular disorders
* von Willebrand's disease
Wala naman nakalagay na factor ng nosebleed ay speaking english diba? So.. its not true that english will make your nose bleed.
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