What causes nosebleeds in hot weather?

Nosebleeds happen frequently, especially among children. Some are caused by trauma, as the nasal cavity is very fragile and easily injured and bleeds. In other cases, nosebleeds are caused by internal reasons. But have you noticed that most people do not have nosebleeds in summer? Why are nosebleeds more common when the weather is hot? So, what causes nosebleeds in hot weather? What factors cause nosebleeds? In fact, there are many reasons that cause nosebleeds, which are introduced one by one below.

The large temperature difference during the day causes the nasal cavity to be dehydrated

The weather is hot and dry in summer, and the temperature difference during the day varies greatly, which causes the liquid secreted by the nasal mucosa to evaporate quickly. The nasal cavity lacks moisture and becomes dry, itchy, and prone to bleeding.

Unstable temperature makes it difficult for the capillaries in the nose to adapt

Due to the instability of temperature throughout the day, the capillaries in the nose repeatedly expand and contract in order to adapt to changes in external temperature. Children, in particular, have delicate capillaries in their noses, and find it even more difficult to adapt to such changes. In addition, they often have the habit of picking their noses, and are active by nature, so falling and getting injured often happen. They may even be so naughty as to stuff toys or paper balls into their noses, so it is not surprising that they suffer nosebleeds.

Hot weather causes nose bleeding due to the upward flow of qi and blood

When the weather is hot and dry, people who are in a bad mood or do not get enough rest will suffer from the upward flow of qi and blood, leading to nosebleeds. Also, drinking alcohol and eating too much spicy food in summer may also lead to lung heat, which will enter the nasal cavity and cause the capillaries to dilate and rupture, leading to nosebleeds. Also, when exposed to the sun, the blood vessels in the head will dilate, causing the blood vessels to dilate and rupture, leading to nosebleeds.

Frequent external mechanical stimulation of the nasal cavity

For example, frequently entering an air-conditioned room in the summer and the alternating hot and cold temperatures will cause itching in the nasal cavity. If you scratch at this time, it is easy to break the capillaries in the nasal cavity and cause nosebleeds. Also, if you blow your nose frequently, it is easy to irritate the capillaries and cause blood vessel ruptures.

Caused by nasal inflammation

Dry rhinitis, atrophic rhinitis, acute rhinitis, acute maxillary sinusitis, etc. are common causes of nosebleeds; in addition, if the rhinitis is more serious, sneezing may cause capillary rupture and cause bleeding.

Caused by hypertension and arteriosclerosis

Hypertension and arteriosclerosis are important causes of nosebleeds in middle-aged and elderly people. Vascular sclerosis is the pathological basis of nosebleeds. Increased blood pressure, especially in the case of constipation, excessive exertion or emotional excitement, can cause rupture of nasal blood vessels and cause nosebleeds.

Caused by increased venous pressure

Diseases such as emphysema, cor pulmonale, and mitral valve stenosis can lead to superior vena cava hypertension; the nasal and nasopharyngeal veins of these patients are often dilated and congested, and are prone to rupture and bleeding, causing nosebleed symptoms.