What Causes Nosebleeds?

Acute Sinusitis

Acute sinusitis is a medical term used interchangeably with acute rhinosinusitis. This condition causes the lining of the sinuses and nose to become inflamed on a short term basis. The inflammation impedes the ability to drain mucus from the sinuses and nose. The most common underlying cause of acute sinusitis is a cold that causes a viral infection. However, there have been noninfectious causes. About one in every eight adults will experience an episode of acute sinusitis every year. Most individuals will experience the condition at least once in their lifetimes. This condition can lead to a nosebleed, especially if excessive nose blowing causes damage to the capillaries in the nose. In addition to the common cold, some causes of acute sinusitis include bacterial and fungal infections, hay fever, other seasonal allergies, nasal polyps, cystic fibrosis, infected adenoids, or a deviated nasal septum. There have also been rare cases in which an infected tooth causes sinusitis because the bacteria spread from the tooth into the sinuses.

Keep reading to learn more about the various causes of nosebleeds now.