"A nosebleed, known medically as epistaxis, comes in two forms: anterior and posterior. About 90% of nosebleeds are anterior, and start in the area between your two nostrils, called Kiesselbach's plexus, says Loftus. This area contains a lot of blood vessels little capillaries that keep the nostrils well supplied with blood, to warm the air you inhale. These can break open, creating a bleed that mostly pours from the nostril, though some blood may trickle into the mouth or throat, especially if you lean your head back."
"Posterior nosebleeds are rarer and bigger. These are triggered when larger blood vessels deeper in the nasal passage burst. If there is significantly more blood flowing down the back of your throat, potentially causing you to choke, that's a posterior nosebleed, explains Dr Amin Javer, an ENT surgeon and research director at the University of British Columbia. Posterior nosebleeds are more serious than anterior ones, and require prompt medical attention. They're most often seen in older adults, especially those taking anticoagulants, which increase the risk of hemorrhage."
A nosebleed (epistaxis) occurs as anterior or posterior bleeding. About 90% of nosebleeds are anterior and originate in Kiesselbach's plexus, a dense network of capillaries between the nostrils that help warm inhaled air. Anterior bleeds usually pour from a nostril and can trickle into the mouth or throat if the head is tilted back. Posterior nosebleeds arise from larger vessels deeper in the nasal passage, produce heavier bleeding that can flow down the throat, risk choking, and require prompt medical care. Posterior bleeds occur more often in older adults and people taking anticoagulants. Immediate first aid is to lean forward, pinch the nose gently, apply a cold compress, and consider a nasal decongestant spray.
Read at www.theguardian.com
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