Nosebleeds, also known as epistaxis, are commonly caused by fragile blood vessels in the nose that bleed easily, especially in dry air or after physical exertion.
Here's a breakdown of potential causes:
- Dry Air: Low humidity, particularly in winter or in dry climates, dries out the nasal membranes, making them more susceptible to bleeding.
- Nose Picking: Trauma to the nasal lining from nose picking is a very common cause.
- Irritation: Infections affecting the nose lining, sinuses or adenoids can cause nosebleeds. Allergies causing hay fever or coughing also contribute.
- Trauma: Injuries to the nose, even minor ones, can rupture blood vessels. This includes bumping the nose or any direct impact.
- Medications: Some medications, such as blood thinners (e.g., warfarin, aspirin) and nasal decongestants (when overused), can increase the risk of nosebleeds.
- Underlying Medical Conditions: Less commonly, nosebleeds can be a symptom of more serious conditions like high blood pressure, bleeding disorders, or tumors in the nasal passages.
Therefore, while fragile blood vessels and dryness are primary culprits, various factors, including infections, allergies, trauma, medications, and underlying medical conditions, can contribute to nosebleeds.
