What is a common cause of epistaxis?

• A. Severe dehydration
• B. Moderate facial trauma
• C. Sleep apnea
• D. High blood pressure

Answer: (B)

Epistaxis, or nosebleed, can occur due to several factors, but moderate facial trauma is widely recognized as a common cause. Trauma to the nasal cavity can damage blood vessels, leading to bleeding. This might involve direct impacts to the face, falls, or any incident that puts stress on the delicate structures within the nose.

The mechanism involves injury to the mucosal lining or the blood vessels themselves, which are numerous and superficial in the nasal region, making them prone to bleeding with any disruption. Therefore, when considering potential causes of epistaxis, moderate facial trauma stands out as a significant contributing factor.

While severe dehydration, sleep apnea, and high blood pressure can influence blood vessel health and bleeding tendency, they are not directly linked to the immediate occurrence of epistaxis in the same way that trauma is. Severe dehydration can lead to dry nasal membranes, which may predispose to bleeding, but it is not as commonly recognized as traumatic injury in this context.