Why does the nose bleed when the weather is hot?

Nosebleed is a very common symptom. This is because there is a membrane 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 nasal vestibule. The small blood vessels in the nasal vestibule are densely reticulated and only protected by a very delicate mucosa, so the small blood vessels are easy to rupture and bleed. When the amount of bleeding is small, the blood drops out, and when it is long, the blood drops out.

There are several factors that usually cause nosebleeds:

1, dry climate. The nasal mucosa is moist, so avoid dryness. No matter in the crisp autumn season or in the cold1February season, as long as the indoor and outdoor climate is dry, nosebleeds are prone to occur.

2, fever. When fever occurs, the heart rate increases, the blood flow rate is fast, and the small blood vessels dilate. In addition, when fever, less water intake, sweating more. In the case of dry mouth, it is easy to cause nosebleeds.

3. trauma. Digging nostrils by hand damages nasal mucosa, leading to blood vessel rupture; In nasal trauma, such as falls and bumps; There are foreign bodies in the nasal cavity; Or sometimes due to external forces such as coughing, sneezing and blowing your nose hard, it may damage the nasal mucosa and cause nosebleeds. Therefore, nosebleeds should be prevented according to the induced causes.

What should I do if I have a nosebleed?

Calm down first, immediately pinch both sides of the nose with your thumb and forefinger to the nasal septum, and then press to stop bleeding.

Second, head forward, face down, open your mouth and breathe, or lie down and raise your head. Never look up, it will make the blood swallow, and if you vomit too much, it will be mistaken for hematemesis.

Third, wet the towel with cold water and apply it to the root of the nose to make the blood vessels contract and stop bleeding when they are cold.

Fourth, use sterile cotton, gauze or toilet paper to block the bleeding site and press the broken blood vessel to stop bleeding. If the bleeding continues after the blockage, or the blood flows out of the mouth through the pharynx, you should go to the hospital for nasal emergency immediately, and you should not neglect it.

In addition, it should be noted that the nose often bleeds, which may be a local problem of the nose or a manifestation of some disease. Therefore, students who often have nosebleeds had better go to the hospital for further examination to avoid delaying their illness.

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