Dryness and allergies are common triggers

 Images?q=tbn:ANd9GcQ Jfb3h Pvl XTwocadTZonQEWadTK38SV0mSPTUxq 80dyY5p

Nosebleeds affect one in seven people during their lives, the American Academy of Otolaryngology says. They’re most common among people aged 2-10, and aged 50-80.

The academy says the most common causes of nosebleeds include:

  • Dryness, allergies or infections.
  • Blowing your nose too hard.
  • A blood clotting problem triggered by heredity or a current medication.
  • A skull fracture or fracture of the nose.
  • Tumors or hereditary blood vessel disorders.

Source:  http://www.nlm.nih.gov/medlineplus/news/fullstory_132471.html