Why do people’s noses bleed when the weather is hot?

Nose bleeding is a very common symptom. This is because there is a septum between the nostrils on both sides of the nasal cavity, where several pairs of blood vessels meet. Especially in the front and lower part of the nasal septum, there is a small area called the nasal vestibule. The small blood vessels in the nasal vestibule are densely packed into a network. It is protected by a very delicate mucous membrane, so small blood vessels can easily rupture and bleed. When the amount of bleeding is small, the blood drips out in spots, and when the amount of bleeding is large, the blood spurts out in a columnar shape.

There are several factors that usually induce nosebleeds:

1. Dry climate. The nasal mucosa likes to be moist and avoids dryness. No matter it is in the crisp autumn season or the cold twelfth lunar month, nose bleeding is prone to occur as long as the climate indoors and outdoors is dry.

2. Fever. When you have a fever, your heart rate speeds up, blood flows quickly, and small blood vessels are dilated. In addition, when you have a fever, you take in less water and sweat more. When you have a dry mouth and tongue, your nose can easily bleed.

3. Trauma. Digging your nose with your hands can damage the nasal mucosa and cause blood vessels to rupture; nasal trauma such as falls and bruises; foreign objects in the nasal cavity; or sometimes external forces such as coughing, sneezing, blowing your nose forcefully, etc., may damage the nasal mucosa and cause nose bleeding. Therefore, nose bleeding should be prevented by targeting the triggering causes.

What should you do if you have nose bleeding?

1. First, calm down, and immediately use your thumb and index finger to pinch both sides of the nose toward the nasal septum and apply pressure to stop bleeding.

2. Lean your head forward, face downward and breathe through your mouth, or lie down with your head elevated. Never raise your head up, as this will make you swallow the blood. If you spit out too much blood, it will be mistaken for vomiting blood.

3. Wet a towel soaked in cold water and apply it to the root of the nose to make the blood vessels contract when cold and stop bleeding.

4. Use sterilized cotton, gauze or toilet paper to block the bleeding area and compress the ruptured blood vessels to stop bleeding. If the bleeding does not stop after the blockage, or the blood comes out of the mouth through the throat, you should go to the hospital's rhinology emergency department immediately and do not neglect it.

In addition, it should also be noted that frequent nose bleeding may be a local problem in the nose, or it may be a manifestation of a certain disease. Therefore, students who often have nose bleeding should go to the hospital for further examination to avoid Delay illness.

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