Final answer:
Blowing the nose too hard, local irritation or dryness, or frequent sneezing can result in a nosebleed, called epistaxis. Sneezing is a similar involuntary response that occurs when nerves lining the nasal passage are irritated. It results in forceful expulsion of air from the mouth, which sprays millions of tiny droplets of mucus and other debris out of the mouth and into the air. The respiratory mucosa swell in response to increased blood flow during pregnancy, leading to nasal congestion and nosebleeds.
Step-by-step explanation:
Blowing the nose too hard, local irritation or dryness, or frequent sneezing can result in a nosebleed, called epistaxis.
Sneezing is a similar involuntary response that occurs when nerves lining the nasal passage are irritated. It results in forceful expulsion of air from the mouth, which sprays millions of tiny droplets of mucus and other debris out of the mouth and into the air. This explains why it is so important to sneeze into a sleeve rather than the air to help prevent the transmission of respiratory pathogens.
The respiratory mucosa swell in response to increased blood flow during pregnancy, leading to nasal congestion and nose bleeds, particularly when the weather is cold and dry. Humidifier use and increased fluid intake are often recommended to counteract congestion.