工地上鼻子出血是常见的事,鼻出血医学名词叫鼻衄。衄血的原因有两种:一是外伤性的;一是病理性的。鼻腔是人呼吸的门户,血液供应十分丰富,在鼻中隔的前下部有许许多多毛细血管吻合成动脉丛,像梅花一样,表浅,血管丰富,是常发生鼻出血的地方,又叫易出血区。由于血管丰富而且表浅,当遇到振动如头部、面部受到物击,就可振破鼻腔内的动脉丛而发生流血。有时候用手指甲抠挖鼻腔内的结痂,也容易划破动脉毛细血管。用力擤 Nose bleeding on the site is a common occurrence, epistaxis medical terminology called epistaxis. Blood for two reasons: First, traumatic; one is pathological. Nasal breathing is the gateway to people, the blood supply is very rich in the nasal septum before the lower part of a large number of capillary anastomosis into arterial plexus, like plum, superficial, rich in blood vessels, nasal bleeding is often the place, also known as bleeding Area. Due to the rich and superficial blood vessels, when encountering vibrations such as the head and face being hit by an object, the bleeding of the artery plexus in the nasal cavity can be broken. Sometimes finger digging scabs within the nasal cavity, but also easy to scratch the arterial capillaries. Use force 擤